diff --git a/toxygen/app.py b/toxygen/app.py
index 7f789eb..b4c5d55 100644
--- a/toxygen/app.py
+++ b/toxygen/app.py
@@ -1,50 +1,60 @@
+import communication.callbacks
 import threads
-
+from PyQt5 import QtWidgets, QtGui, QtCore
+import ui.password_screen as passwordscreen
+from util.util import curr_directory, get_platform, get_images_directory, get_styles_directory, log
+import updater.updater as updater
+import os
+from communication.tox_factory import tox_factory
+import wrapper.libtox as libtox
+import user_data.toxes
+from user_data.settings import Settings
+from ui.login_screen import LoginScreen
+from user_data.profile_manager import ProfileManager
 
 
 class App:
 
-    def __init__(self, path_or_uri=None):
+    def __init__(self, path_to_profile=None, uri=None):
         self.tox = self.ms = self.init = self.app = self.tray = self.mainloop = self.avloop = None
-        if path_or_uri is None:
-            self.uri = self.path = None
-        elif path_or_uri.startswith('tox:'):
-            self.path = None
-            self.uri = path_or_uri[4:]
-        else:
-            self.path = path_or_uri
-            self.uri = None
+        self.uri = self.path = self.toxes = None
+        if uri is not None and uri.startswith('tox:'):
+            self.uri = uri[4:]
+        if path_to_profile is not None:
+            self.path = path_to_profile
 
     def enter_pass(self, data):
         """
         Show password screen
         """
-        tmp = [data]
-        p = PasswordScreen(toxes.ToxES.get_instance(), tmp)
+        p = passwordscreen.PasswordScreen(self.toxes, data)
         p.show()
         self.app.lastWindowClosed.connect(self.app.quit)
         self.app.exec_()
-        if tmp[0] == data:
+        result = p.result
+        if result is None:
             raise SystemExit()
         else:
-            return tmp[0]
+            return result
 
     def main(self):
         """
         Main function of app. loads login screen if needed and starts main screen
         """
-        app = QtWidgets.QApplication(sys.argv)
-        app.setWindowIcon(QtGui.QIcon(curr_directory() + '/images/icon.png'))
+        app = QtWidgets.QApplication([])
+        icon_file = os.path.join(get_images_directory(), 'icon.png')
+        app.setWindowIcon(QtGui.QIcon(icon_file))
         self.app = app
 
-        if platform.system() == 'Linux':
+        if get_platform() == 'Linux':
             QtCore.QCoreApplication.setAttribute(QtCore.Qt.AA_X11InitThreads)
 
-        with open(curr_directory() + '/styles/dark_style.qss') as fl:
+        with open(os.path.join(get_styles_directory(), 'dark_style.qss')) as fl:
             style = fl.read()
         app.setStyleSheet(style)
 
-        encrypt_save = toxes.ToxES()
+        encrypt_save = libtox.LibToxEncryptSave()
+        toxes = user_data.toxes.ToxES(encrypt_save)
 
         if self.path is not None:
             path = os.path.dirname(self.path) + '/'
@@ -70,15 +80,13 @@ class App:
                 ls = LoginScreen()
                 ls.setWindowIconText("Toxygen")
                 profiles = ProfileManager.find_profiles()
-                ls.update_select(map(lambda x: x[1], profiles))
-                _login = self.Login(profiles)
-                ls.update_on_close(_login.login_screen_close)
+                ls.update_select(profiles)
                 ls.show()
                 app.exec_()
-                if not _login.t:
+                result = ls.result
+                if result is None:
                     return
-                elif _login.t == 1:  # create new profile
-                    _login.name = _login.name.strip()
+                elif result.is_new_profile():  # create new profile
                     name = _login.name if _login.name else 'toxygen_user'
                     pr = map(lambda x: x[1], ProfileManager.find_profiles())
                     if name in list(pr):
@@ -130,14 +138,14 @@ class App:
                         settings['language'] = curr_lang
                     settings.save()
                 else:  # load existing profile
-                    path, name = _login.get_data()
-                    if _login.default:
-                        Settings.set_auto_profile(path, name)
-                    data = ProfileManager(path, name).open_profile()
-                    if encrypt_save.is_data_encrypted(data):
+                    path = result.profile_path
+                    if result.load_as_default:
+                        Settings.set_auto_profile(path)
+                    settings = Settings(toxes, path)
+                    data = ProfileManager(settings, toxes, path).open_profile()
+                    if toxes.is_data_encrypted(data):
                         data = self.enter_pass(data)
-                    settings = Settings(name)
-                    self.tox = profile.tox_factory(data, settings)
+                    self.tox = communication.tox_factory.tox_factory(data, settings)
             else:
                 path, name = auto_profile
                 data = ProfileManager(path, name).open_profile()
@@ -264,4 +272,4 @@ class App:
         plugin_helper = PluginLoader.get_instance()
         plugin_helper.set_tox(self.tox)
 
-        return self.tox
\ No newline at end of file
+        return self.tox
diff --git a/toxygen/communication/callbacks.py b/toxygen/communication/callbacks.py
index ac93173..0566325 100644
--- a/toxygen/communication/callbacks.py
+++ b/toxygen/communication/callbacks.py
@@ -5,10 +5,7 @@ from contacts.profile import Profile
 from wrapper.toxcore_enums_and_consts import *
 from wrapper.toxav_enums import *
 from wrapper.tox import bin_to_string
-from plugin_support import PluginLoader
-import queue
-import threading
-import util
+from plugin_support.plugin_support import PluginLoader
 import cv2
 import numpy as np
 from threads import invoke_in_main_thread, execute
@@ -31,6 +28,7 @@ def self_connection_status(tox, profile):
             invoke_in_main_thread(profile.set_status, status)
         elif connection == TOX_CONNECTION['NONE']:
             invoke_in_main_thread(profile.set_status, None)
+
     return wrapped
 
 
@@ -132,41 +130,45 @@ def friend_request(contacts_manager):
     return wrapped
 
 
-def friend_typing(tox, friend_number, typing, user_data):
-    invoke_in_main_thread(Profile.get_instance().friend_typing, friend_number, typing)
+def friend_typing(contacts_manager):
+    def wrapped(tox, friend_number, typing, user_data):
+        invoke_in_main_thread(contacts_manager.friend_typing, friend_number, typing)
+
+    return wrapped
 
 
-def friend_read_receipt(tox, friend_number, message_id, user_data):
-    profile = Profile.get_instance()
-    profile.get_friend_by_number(friend_number).dec_receipt()
-    if friend_number == profile.get_active_number():
-        invoke_in_main_thread(profile.receipt)
+def friend_read_receipt(contacts_manager):
+    def wrapped(tox, friend_number, message_id, user_data):
+        contacts_manager.get_friend_by_number(friend_number).dec_receipt()
+        if friend_number == contacts_manager.get_active_number():
+            invoke_in_main_thread(contacts_manager.receipt)
+
+    return wrapped
+
 
 # -----------------------------------------------------------------------------------------------------------------
 # Callbacks - file transfers
 # -----------------------------------------------------------------------------------------------------------------
 
 
-def tox_file_recv(window, tray):
+def tox_file_recv(window, tray, profile, file_transfer_handler, contacts_manager, settings):
     """
     New incoming file
     """
     def wrapped(tox, friend_number, file_number, file_type, size, file_name, file_name_size, user_data):
-        profile = Profile.get_instance()
-        settings = Settings.get_instance()
         if file_type == TOX_FILE_KIND['DATA']:
             print('File')
             try:
                 file_name = str(file_name[:file_name_size], 'utf-8')
             except:
                 file_name = 'toxygen_file'
-            invoke_in_main_thread(profile.incoming_file_transfer,
+            invoke_in_main_thread(file_transfer_handler.incoming_file_transfer,
                                   friend_number,
                                   file_number,
                                   size,
                                   file_name)
             if not window.isActiveWindow():
-                friend = profile.get_friend_by_number(friend_number)
+                friend = contacts_manager.get_friend_by_number(friend_number)
                 if settings['notifications'] and profile.status != TOX_USER_STATUS['BUSY'] and not settings.locked:
                     file_from = QtWidgets.QApplication.translate("Callback", "File from")
                     invoke_in_main_thread(tray_notification, file_from + ' ' + friend.name, file_name, tray, window)
@@ -175,7 +177,7 @@ def tox_file_recv(window, tray):
                 invoke_in_main_thread(tray.setIcon, QtGui.QIcon(curr_directory() + '/images/icon_new_messages.png'))
         else:  # AVATAR
             print('Avatar')
-            invoke_in_main_thread(profile.incoming_avatar,
+            invoke_in_main_thread(file_transfer_handler.incoming_avatar,
                                   friend_number,
                                   file_number,
                                   size)
@@ -222,55 +224,69 @@ def file_recv_control(file_transfer_handler):
 # -----------------------------------------------------------------------------------------------------------------
 
 
-def lossless_packet(tox, friend_number, data, length, user_data):
-    """
-    Incoming lossless packet
-    """
-    data = data[:length]
-    plugin = PluginLoader.get_instance()
-    invoke_in_main_thread(plugin.callback_lossless, friend_number, data)
+def lossless_packet(plugin_loader):
+    def wrapped(tox, friend_number, data, length, user_data):
+        """
+        Incoming lossless packet
+        """
+        data = data[:length]
+        invoke_in_main_thread(plugin_loader.callback_lossless, friend_number, data)
+
+    return wrapped
 
 
-def lossy_packet(tox, friend_number, data, length, user_data):
-    """
-    Incoming lossy packet
-    """
-    data = data[:length]
-    plugin = PluginLoader.get_instance()
-    invoke_in_main_thread(plugin.callback_lossy, friend_number, data)
+def lossy_packet(plugin_loader):
+    def wrapped(tox, friend_number, data, length, user_data):
+        """
+        Incoming lossy packet
+        """
+        data = data[:length]
+        plugin = PluginLoader.get_instance()
+        invoke_in_main_thread(plugin.callback_lossy, friend_number, data)
+
+    return wrapped
 
 
 # -----------------------------------------------------------------------------------------------------------------
 # Callbacks - audio
 # -----------------------------------------------------------------------------------------------------------------
 
-def call_state(toxav, friend_number, mask, user_data):
-    """
-    New call state
-    """
-    print(friend_number, mask)
-    if mask == TOXAV_FRIEND_CALL_STATE['FINISHED'] or mask == TOXAV_FRIEND_CALL_STATE['ERROR']:
-        invoke_in_main_thread(Profile.get_instance().stop_call, friend_number, True)
-    else:
-        Profile.get_instance().call.toxav_call_state_cb(friend_number, mask)
+def call_state(calls_manager):
+    def wrapped(toxav, friend_number, mask, user_data):
+        """
+        New call state
+        """
+        print(friend_number, mask)
+        if mask == TOXAV_FRIEND_CALL_STATE['FINISHED'] or mask == TOXAV_FRIEND_CALL_STATE['ERROR']:
+            invoke_in_main_thread(calls_manager.stop_call, friend_number, True)
+        else:
+            calls_manager.toxav_call_state_cb(friend_number, mask)
+
+    return wrapped
 
 
-def call(toxav, friend_number, audio, video, user_data):
-    """
-    Incoming call from friend
-    """
-    print(friend_number, audio, video)
-    invoke_in_main_thread(Profile.get_instance().incoming_call, audio, video, friend_number)
+def call(calls_manager):
+    def wrapped(toxav, friend_number, audio, video, user_data):
+        """
+        Incoming call from friend
+        """
+        print(friend_number, audio, video)
+        invoke_in_main_thread(calls_manager.incoming_call, audio, video, friend_number)
+
+    return wrapped
 
 
-def callback_audio(toxav, friend_number, samples, audio_samples_per_channel, audio_channels_count, rate, user_data):
-    """
-    New audio chunk
-    """
-    Profile.get_instance().call.audio_chunk(
-        bytes(samples[:audio_samples_per_channel * 2 * audio_channels_count]),
-        audio_channels_count,
-        rate)
+def callback_audio(calls_manager):
+    def wrapped(toxav, friend_number, samples, audio_samples_per_channel, audio_channels_count, rate, user_data):
+        """
+        New audio chunk
+        """
+        calls_manager.call.audio_chunk(
+            bytes(samples[:audio_samples_per_channel * 2 * audio_channels_count]),
+            audio_channels_count,
+            rate)
+
+    return wrapped
 
 # -----------------------------------------------------------------------------------------------------------------
 # Callbacks - video
@@ -333,11 +349,6 @@ def video_receive_frame(toxav, friend_number, width, height, y, u, v, ystride, u
 # -----------------------------------------------------------------------------------------------------------------
 
 
-def group_invite(tox, friend_number, gc_type, data, length,  user_data):
-    invoke_in_main_thread(Profile.get_instance().group_invite, friend_number, gc_type,
-                          bytes(data[:length]))
-
-
 def show_gc_notification(window, tray, message, group_number, peer_number):
     profile = Profile.get_instance()
     settings = Settings.get_instance()
@@ -350,72 +361,40 @@ def show_gc_notification(window, tray, message, group_number, peer_number):
             sound_notification(SOUND_NOTIFICATION['MESSAGE'])
         invoke_in_main_thread(tray.setIcon, QtGui.QIcon(curr_directory() + '/images/icon_new_messages.png'))
 
-
-def group_message(window, tray):
-    def wrapped(tox, group_number, peer_number, message, length, user_data):
-        message = str(message[:length], 'utf-8')
-        invoke_in_main_thread(Profile.get_instance().new_gc_message, group_number,
-                              peer_number, TOX_MESSAGE_TYPE['NORMAL'], message)
-        show_gc_notification(window, tray, message, group_number, peer_number)
-    return wrapped
-
-
-def group_action(window, tray):
-    def wrapped(tox, group_number, peer_number, message, length, user_data):
-        message = str(message[:length], 'utf-8')
-        invoke_in_main_thread(Profile.get_instance().new_gc_message, group_number,
-                              peer_number, TOX_MESSAGE_TYPE['ACTION'], message)
-        show_gc_notification(window, tray, message, group_number, peer_number)
-    return wrapped
-
-
-def group_title(tox, group_number, peer_number, title, length, user_data):
-    invoke_in_main_thread(Profile.get_instance().new_gc_title, group_number,
-                          title[:length])
-
-
-def group_namelist_change(tox, group_number, peer_number, change, user_data):
-    invoke_in_main_thread(Profile.get_instance().update_gc, group_number)
-
 # -----------------------------------------------------------------------------------------------------------------
 # Callbacks - initialization
 # -----------------------------------------------------------------------------------------------------------------
 
 
-def init_callbacks(tox, window, tray):
+def init_callbacks(tox, profile, settings, plugin_loader, contacts_manager,
+                   calls_manager, file_transfer_handler, window, tray):
     """
     Initialization of all callbacks.
     :param tox: tox instance
     :param window: main window
     :param tray: tray (for notifications)
     """
-    tox.callback_self_connection_status(self_connection_status(tox), 0)
+    tox.callback_self_connection_status(self_connection_status(tox, profile), 0)
 
-    tox.callback_friend_status(friend_status, 0)
-    tox.callback_friend_message(friend_message(window, tray), 0)
-    tox.callback_friend_connection_status(friend_connection_status, 0)
-    tox.callback_friend_name(friend_name, 0)
-    tox.callback_friend_status_message(friend_status_message, 0)
-    tox.callback_friend_request(friend_request, 0)
-    tox.callback_friend_typing(friend_typing, 0)
-    tox.callback_friend_read_receipt(friend_read_receipt, 0)
+    tox.callback_friend_status(friend_status(profile, settings), 0)
+    tox.callback_friend_message(friend_message(profile, settings, window, tray), 0)
+    tox.callback_friend_connection_status(friend_connection_status(profile, settings, plugin_loader), 0)
+    tox.callback_friend_name(friend_name(profile), 0)
+    tox.callback_friend_status_message(friend_status_message(profile), 0)
+    tox.callback_friend_request(friend_request(contacts_manager), 0)
+    tox.callback_friend_typing(friend_typing(contacts_manager), 0)
+    tox.callback_friend_read_receipt(friend_read_receipt(contacts_manager), 0)
 
-    tox.callback_file_recv(tox_file_recv(window, tray), 0)
-    tox.callback_file_recv_chunk(file_recv_chunk, 0)
-    tox.callback_file_chunk_request(file_chunk_request, 0)
-    tox.callback_file_recv_control(file_recv_control, 0)
+    tox.callback_file_recv(tox_file_recv(window, tray, profile, file_transfer_handler, contacts_manager, settings), 0)
+    tox.callback_file_recv_chunk(file_recv_chunk(file_transfer_handler), 0)
+    tox.callback_file_chunk_request(file_chunk_request(file_transfer_handler), 0)
+    tox.callback_file_recv_control(file_recv_control(file_transfer_handler), 0)
 
-    toxav = tox.AV
-    toxav.callback_call_state(call_state, 0)
-    toxav.callback_call(call, 0)
-    toxav.callback_audio_receive_frame(callback_audio, 0)
+    toxav.callback_call_state(call_state(calls_manager), 0)
+    toxav.callback_call(call(calls_manager), 0)
+    toxav.callback_audio_receive_frame(callback_audio(calls_manager), 0)
     toxav.callback_video_receive_frame(video_receive_frame, 0)
 
-    tox.callback_friend_lossless_packet(lossless_packet, 0)
-    tox.callback_friend_lossy_packet(lossy_packet, 0)
+    tox.callback_friend_lossless_packet(lossless_packet(plugin_loader), 0)
+    tox.callback_friend_lossy_packet(lossy_packet(plugin_loader), 0)
 
-    tox.callback_group_invite(group_invite)
-    tox.callback_group_message(group_message(window, tray))
-    tox.callback_group_action(group_action(window, tray))
-    tox.callback_group_title(group_title)
-    tox.callback_group_namelist_change(group_namelist_change)
diff --git a/toxygen/contacts/profile.py b/toxygen/contacts/profile.py
index 9d33f19..eb69044 100644
--- a/toxygen/contacts/profile.py
+++ b/toxygen/contacts/profile.py
@@ -3,10 +3,9 @@ from PyQt5 import QtWidgets
 from contacts.friend import *
 from user_data.settings import *
 from wrapper.toxcore_enums_and_consts import *
-from ctypes import *
-from util import log, Singleton, curr_directory
+from util.util import log, curr_directory
 from network.tox_dns import tox_dns
-from db.database import *
+from history.database import *
 from file_transfers.file_transfers import *
 import time
 from av import calls
@@ -19,7 +18,7 @@ from contacts.group_chat import *
 import re
 
 
-class Profile(basecontact.BaseContact, Singleton):
+class Profile(basecontact.BaseContact):
     """
     Profile of current toxygen user. Contains friends list, tox instance
     """
@@ -33,7 +32,6 @@ class Profile(basecontact.BaseContact, Singleton):
                                          tox.self_get_status_message(),
                                          screen.user_info,
                                          tox.self_get_address())
-        Singleton.__init__(self)
         self._screen = screen
         self._messages = screen.messages
         self._tox = tox
@@ -43,8 +41,6 @@ class Profile(basecontact.BaseContact, Singleton):
         self._factory = items_factory.ItemsFactory(self._screen.friends_list, self._messages)
         settings = Settings.get_instance()
         self._show_avatars = settings['show_avatars']
-        self._paused_file_transfers = dict(settings['paused_file_transfers'])
-        # key - file id, value: [path, friend number, is incoming, start position]
 
 
     # -----------------------------------------------------------------------------------------------------------------
@@ -97,6 +93,7 @@ class Profile(basecontact.BaseContact, Singleton):
 
     def get_friend_by_number(self, num):
         return list(filter(lambda x: x.number == num and type(x) is Friend, self._contacts))[0]
+
     def get_last_message(self):
         if self._active_friend + 1:
             return self.get_curr_friend().get_last_message_text()
diff --git a/toxygen/file_transfers/file_transfers_handler.py b/toxygen/file_transfers/file_transfers_handler.py
index 2706d97..6431fe4 100644
--- a/toxygen/file_transfers/file_transfers_handler.py
+++ b/toxygen/file_transfers/file_transfers_handler.py
@@ -9,6 +9,8 @@ class FileTransfersHandler:
         self._tox = tox
         self._settings = settings
         self._file_transfers = {}
+        self._paused_file_transfers = dict(settings['paused_file_transfers'])
+        # key - file id, value: [path, friend number, is incoming, start position]
 
     # -----------------------------------------------------------------------------------------------------------------
     # File transfers support
diff --git a/toxygen/main.py b/toxygen/main.py
index e8a4694..42e8b76 100644
--- a/toxygen/main.py
+++ b/toxygen/main.py
@@ -1,9 +1,12 @@
 import sys
 import app
 from user_data.settings import *
-from util.util import curr_directory, program_version, remove
+from util.util import curr_directory, remove
 import argparse
 
+__maintainer__ = 'Ingvar'
+__version__ = '0.5.0'
+
 
 def clean():
     """Removes all windows libs from libs folder"""
@@ -15,30 +18,31 @@ def reset():
     Settings.reset_auto_profile()
 
 
+def print_toxygen_version():
+    print('Toxygen v' + __version__)
+
+
 def main():
     parser = argparse.ArgumentParser()
-    parser.add_argument('--version')
-    parser.add_argument('--clean')
-    parser.add_argument('--reset')
+    parser.add_argument('--version', help='Prints Toxygen version')
+    parser.add_argument('--clean', help='Deletes toxcore libs from libs folder')
+    parser.add_argument('--reset', help='Resets default profile')
+    parser.add_argument('profile_path', nargs='?', default=None, help='Resets default profile')
     args = parser.parse_args()
-    if not len(args):
-        toxygen = app.App()
-    else:  # started with argument(s)
-        arg = sys.argv[1]
-        if arg == '--version':
-            print('Toxygen v' + program_version)
-            return
-        elif arg == '--help':
-            print('Usage:\ntoxygen path_to_profile\ntoxygen tox_id\ntoxygen --version\ntoxygen --reset')
-            return
-        elif arg == '--clean':
-            clean()
-            return
-        elif arg == '--reset':
-            reset()
-            return
-        else:
-            toxygen = app.App(arg)
+
+    if args.version:
+        print_toxygen_version()
+        return
+
+    if args.clean:
+        clean()
+        return
+
+    if args.reset:
+        reset()
+        return
+
+    toxygen = app.App(path_to_profile=args.profile_path)
     toxygen.main()
 
 
diff --git a/toxygen/network/tox_dns.py b/toxygen/network/tox_dns.py
index 36702ee..d3d48a1 100644
--- a/toxygen/network/tox_dns.py
+++ b/toxygen/network/tox_dns.py
@@ -1,6 +1,6 @@
 import json
 import urllib.request
-from util import log
+from util.util import log
 from user_data import settings
 from PyQt5 import QtNetwork, QtCore
 
diff --git a/toxygen/plugin_support/plugin_support.py b/toxygen/plugin_support/plugin_support.py
index de39e5f..6f2af9c 100644
--- a/toxygen/plugin_support/plugin_support.py
+++ b/toxygen/plugin_support/plugin_support.py
@@ -1,4 +1,4 @@
-import util
+import util.util as util
 from contacts import profile
 import os
 import importlib
@@ -8,15 +8,15 @@ from user_data import toxes
 import sys
 
 
-class PluginLoader(util.Singleton):
+class PluginLoader():
 
-    def __init__(self, tox, settings):
+    def __init__(self, tox, toxes, profile, settings):
         super().__init__()
-        self._profile = profile.Profile.get_instance()
+        self._profile = profile
         self._settings = settings
         self._plugins = {}  # dict. key - plugin unique short name, value - tuple (plugin instance, is active)
         self._tox = tox
-        self._encr = toxes.ToxES.get_instance()
+        self._toxes = toxes
 
     def set_tox(self, tox):
         """
@@ -55,7 +55,7 @@ class PluginLoader(util.Singleton):
                 if inspect.isclass(obj) and hasattr(obj, 'is_plugin') and obj.is_plugin:
                     print('Plugin', elem)
                     try:  # create instance of plugin class
-                        inst = obj(self._tox, self._profile, self._settings, self._encr)
+                        inst = obj(self._tox, self._profile, self._settings, self._toxes)
                         autostart = inst.get_short_name() in self._settings['plugins']
                         if autostart:
                             inst.start()
@@ -158,7 +158,7 @@ class PluginLoader(util.Singleton):
                 try:
                     result.extend(elem[0].get_message_menu(menu, selected_text))
                 except:
-                    continue
+                    pass
         return result
 
     def stop(self):
diff --git a/toxygen/smileys_and_stickers.py b/toxygen/smileys_and_stickers.py
index 7294185..dd72fd9 100644
--- a/toxygen/smileys_and_stickers.py
+++ b/toxygen/smileys_and_stickers.py
@@ -5,7 +5,7 @@ from collections import OrderedDict
 from PyQt5 import QtCore
 
 
-class SmileyLoader(util.Singleton):
+class SmileyLoader:
     """
     Class which loads smileys packs and insert smileys into messages
     """
diff --git a/toxygen/threads.py b/toxygen/threads.py
index f437d5a..4a129d1 100644
--- a/toxygen/threads.py
+++ b/toxygen/threads.py
@@ -1,11 +1,11 @@
 from PyQt5 import QtCore
-from communication.callbacks import init_callbacks
 from bootstrap.bootstrap import *
 import threading
 import queue
 from util import util
 
 
+
 class InitThread(QtCore.QThread):
 
     def __init__(self, tox, ms, tray):
diff --git a/toxygen/tray.py b/toxygen/tray.py
index bc22ed4..0c474b4 100644
--- a/toxygen/tray.py
+++ b/toxygen/tray.py
@@ -3,6 +3,19 @@ from util.ui import tr
 from util.util import curr_directory
 
 
+class SystemTrayIcon(QtWidgets.QSystemTrayIcon):
+
+    leftClicked = QtCore.pyqtSignal()
+
+    def __init__(self, icon, parent=None):
+        super().__init__(self, icon, parent)
+        self.activated.connect(self.iconActivated)
+
+    def iconActivated(self, reason):
+        if reason == QtGui.QSystemTrayIcon.Trigger:
+            self.leftClicked.emit()
+
+
 class Menu(QtWidgets.QMenu):
 
     def __init__(self, settings, profile, *args):
@@ -39,7 +52,7 @@ class Menu(QtWidgets.QMenu):
 
 
 def init_tray(profile, settings, main_screen):
-    tray = QtWidgets.QSystemTrayIcon(QtGui.QIcon(curr_directory() + '/images/icon.png'))
+    tray = SystemTrayIcon(QtGui.QIcon(curr_directory() + '/images/icon.png'))
     tray.setObjectName('tray')
 
     m = Menu(settings, profile)
diff --git a/toxygen/ui/avwidgets.py b/toxygen/ui/avwidgets.py
index 67bd04a..a783eca 100644
--- a/toxygen/ui/avwidgets.py
+++ b/toxygen/ui/avwidgets.py
@@ -5,7 +5,7 @@ import util
 import pyaudio
 import wave
 from user_data import settings
-from util import curr_directory
+from util.util import curr_directory
 
 
 class IncomingCallWidget(widgets.CenteredWidget):
diff --git a/toxygen/ui/list_items.py b/toxygen/ui/list_items.py
index 64b4a2e..76e6185 100644
--- a/toxygen/ui/list_items.py
+++ b/toxygen/ui/list_items.py
@@ -2,7 +2,7 @@ from wrapper.toxcore_enums_and_consts import *
 from PyQt5 import QtCore, QtGui, QtWidgets
 from contacts import profile
 from file_transfers.file_transfers import TOX_FILE_TRANSFER_STATE, PAUSED_FILE_TRANSFERS, DO_NOT_SHOW_ACCEPT_BUTTON, ACTIVE_FILE_TRANSFERS, SHOW_PROGRESS_BAR
-from util import curr_directory, convert_time, curr_time
+from util.util import curr_directory, convert_time, curr_time
 from ui.widgets import DataLabel, create_menu
 import html as h
 import smileys
@@ -60,8 +60,8 @@ class MessageEdit(QtWidgets.QTextBrowser):
     def quote_text(self):
         text = self.textCursor().selection().toPlainText()
         if text:
-            from ui import mainscreen
-            window = mainscreen.MainWindow.get_instance()
+            from ui import main_screen
+            window = main_screen.MainWindow.get_instance()
             text = '>' + '\n>'.join(text.split('\n'))
             if window.messageEdit.toPlainText():
                 text = '\n' + text
diff --git a/toxygen/ui/loginscreen.py b/toxygen/ui/login_screen.py
similarity index 69%
rename from toxygen/ui/loginscreen.py
rename to toxygen/ui/login_screen.py
index cc1f45c..a5c91e1 100644
--- a/toxygen/ui/loginscreen.py
+++ b/toxygen/ui/login_screen.py
@@ -1,4 +1,5 @@
 from ui.widgets import *
+import os.path
 
 
 class NickEdit(LineEdit):
@@ -14,12 +15,40 @@ class NickEdit(LineEdit):
             super(NickEdit, self).keyPressEvent(event)
 
 
-class LoginScreen(CenteredWidget):
+class LoginScreenResult:
+
+    def __init__(self, profile_path, load_as_default, password=None):
+        self._profile_path = profile_path
+        self._load_as_default = load_as_default
+        self._password = password
+
+    def get_profile_path(self):
+        return self._profile_path
+
+    profile_path = property(get_profile_path)
+
+    def get_load_as_default(self):
+        return self._load_as_default
+
+    load_as_default = property(get_load_as_default)
+
+    def get_password(self):
+        return self._password
+
+    password = property(get_password)
+
+    def is_new_profile(self):
+        return not os.path.isfile(self._profile_path)
+
+
+class LoginScreen(CenteredWidget, DialogWithResult):
 
     def __init__(self):
-        super(LoginScreen, self).__init__()
+        CenteredWidget.__init__(self)
+        DialogWithResult.__init__(self)
         self.initUI()
         self.center()
+        self._profiles = []
 
     def initUI(self):
         self.resize(400, 200)
@@ -34,7 +63,7 @@ class LoginScreen(CenteredWidget):
         self.new_name.setGeometry(QtCore.QRect(20, 100, 171, 31))
         self.load_profile = QtWidgets.QPushButton(self)
         self.load_profile.setGeometry(QtCore.QRect(220, 150, 161, 27))
-        self.load_profile.clicked.connect(self.load_ex_profile)
+        self.load_profile.clicked.connect(self.load_existing_profile)
         self.default = QtWidgets.QCheckBox(self)
         self.default.setGeometry(QtCore.QRect(220, 110, 131, 22))
         self.groupBox = QtWidgets.QGroupBox(self)
@@ -44,6 +73,7 @@ class LoginScreen(CenteredWidget):
         self.groupBox_2 = QtWidgets.QGroupBox(self)
         self.groupBox_2.setGeometry(QtCore.QRect(10, 40, 191, 151))
         self.toxygen = QtWidgets.QLabel(self)
+        self.toxygen.setGeometry(QtCore.QRect(160, 8, 90, 25))
         self.groupBox.raise_()
         self.groupBox_2.raise_()
         self.comboBox.raise_()
@@ -51,16 +81,11 @@ class LoginScreen(CenteredWidget):
         self.load_profile.raise_()
         self.new_name.raise_()
         self.new_profile.raise_()
-        self.toxygen.setGeometry(QtCore.QRect(160, 8, 90, 25))
         font = QtGui.QFont()
         font.setFamily("Impact")
         font.setPointSize(16)
         self.toxygen.setFont(font)
         self.toxygen.setObjectName("toxygen")
-        self.type = 0
-        self.number = -1
-        self.load_as_default = False
-        self.name = None
         self.retranslateUi()
         QtCore.QMetaObject.connectSlotsByName(self)
 
@@ -80,19 +105,18 @@ class LoginScreen(CenteredWidget):
         self.name = self.new_name.text()
         self.close()
 
-    def load_ex_profile(self):
-        if not self.create_only:
-            self.type = 2
-            self.number = self.comboBox.currentIndex()
-            self.load_as_default = self.default.isChecked()
-            self.close()
+    def load_existing_profile(self):
+        index = self.comboBox.currentIndex()
+        load_as_default = self.default.isChecked()
+        path  = os.path.join(self._profiles[index][0], self._profiles[index][1] + '.tox')
+        result = LoginScreenResult(path, load_as_default)
+        self.close_with_result(result)
 
-    def update_select(self, data):
-        list_of_profiles = []
-        for elem in data:
-            list_of_profiles.append(elem)
-        self.comboBox.addItems(list_of_profiles)
-        self.create_only = not list_of_profiles
+    def update_select(self, profiles):
+        profiles = sorted(profiles, key=lambda p: p[1])
+        self._profiles = list(profiles)
+        self.comboBox.addItems(list(map(lambda p: p[1], profiles)))
+        self.load_profile.setEnabled(len(profiles) > 0)
 
     def update_on_close(self, func):
         self.onclose = func
diff --git a/toxygen/ui/mainscreen.py b/toxygen/ui/main_screen.py
similarity index 99%
rename from toxygen/ui/mainscreen.py
rename to toxygen/ui/main_screen.py
index ce828b0..c2912d6 100644
--- a/toxygen/ui/mainscreen.py
+++ b/toxygen/ui/main_screen.py
@@ -3,7 +3,7 @@ from contacts.profile import *
 from ui.list_items import *
 from ui.widgets import MultilineEdit, ComboBox
 import plugin_support
-from ui.mainscreen_widgets import *
+from ui.main_screen_widgets import *
 from user_data import toxes, settings
 
 
diff --git a/toxygen/ui/mainscreen_widgets.py b/toxygen/ui/main_screen_widgets.py
similarity index 100%
rename from toxygen/ui/mainscreen_widgets.py
rename to toxygen/ui/main_screen_widgets.py
diff --git a/toxygen/ui/passwordscreen.py b/toxygen/ui/password_screen.py
similarity index 95%
rename from toxygen/ui/passwordscreen.py
rename to toxygen/ui/password_screen.py
index 9d3d523..bd6c146 100644
--- a/toxygen/ui/passwordscreen.py
+++ b/toxygen/ui/password_screen.py
@@ -1,4 +1,4 @@
-from ui.widgets import CenteredWidget, LineEdit
+from ui.widgets import CenteredWidget, LineEdit, DialogWithResult
 from PyQt5 import QtCore, QtWidgets
 
 
@@ -16,10 +16,11 @@ class PasswordArea(LineEdit):
             super(PasswordArea, self).keyPressEvent(event)
 
 
-class PasswordScreenBase(CenteredWidget):
+class PasswordScreenBase(CenteredWidget, DialogWithResult):
 
     def __init__(self, encrypt):
-        super(PasswordScreenBase, self).__init__()
+        CenteredWidget.__init__(self)
+        DialogWithResult.__init__(self)
         self._encrypt = encrypt
         self.initUI()
 
@@ -73,13 +74,12 @@ class PasswordScreen(PasswordScreenBase):
         if self.password.text():
             try:
                 self._encrypt.set_password(self.password.text())
-                new_data = self._encrypt.pass_decrypt(self._data[0])
+                new_data = self._encrypt.pass_decrypt(self._data)
             except Exception as ex:
                 self.warning.setVisible(True)
                 print('Decryption error:', ex)
             else:
-                self._data[0] = new_data
-                self.close()
+                self.close_with_result(new_data)
 
 
 class UnlockAppScreen(PasswordScreenBase):
diff --git a/toxygen/ui/widgets.py b/toxygen/ui/widgets.py
index b63deb0..7b811e7 100644
--- a/toxygen/ui/widgets.py
+++ b/toxygen/ui/widgets.py
@@ -32,6 +32,22 @@ class CenteredWidget(QtWidgets.QWidget):
         self.move(qr.topLeft())
 
 
+class DialogWithResult(QtWidgets.QWidget):
+
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self._result = None
+
+    def get_result(self):
+        return self._result
+
+    result = property(get_result)
+
+    def close_with_result(self, result):
+        self._result = result
+        self.close()
+
+
 class LineEdit(QtWidgets.QLineEdit):
 
     def __init__(self, parent=None):
diff --git a/toxygen/user_data/profile_manager.py b/toxygen/user_data/profile_manager.py
index 12ce185..a810105 100644
--- a/toxygen/user_data/profile_manager.py
+++ b/toxygen/user_data/profile_manager.py
@@ -1,11 +1,17 @@
+import util.util as util
+import os
+from user_data.settings import Settings
+
+
 class ProfileManager:
     """
     Class with methods for search, load and save profiles
     """
-    def __init__(self, path, name):
-        path = append_slash(path)
-        self._path = path + name + '.tox'
-        self._directory = path
+    def __init__(self, settings, toxes, path):
+        self._settings = settings
+        self._toxes = toxes
+        self._path = path
+        self._directory = os.path.basename(path)
         # create /avatars if not exists:
         directory = path + 'avatars'
         if not os.path.exists(directory):
@@ -23,9 +29,8 @@ class ProfileManager:
         return self._directory
 
     def save_profile(self, data):
-        inst = ToxES.get_instance()
-        if inst.has_password():
-            data = inst.pass_encrypt(data)
+        if self._toxes.has_password():
+            data = self._toxes.pass_encrypt(data)
         with open(self._path, 'wb') as fl:
             fl.write(data)
         print('Profile saved successfully')
@@ -37,11 +42,11 @@ class ProfileManager:
         with open(path, 'wb') as fout:
             fout.write(data)
         print('Profile exported successfully')
-        copy(self._directory + 'avatars', new_path + 'avatars')
+        util.copy(self._directory + 'avatars', new_path + 'avatars')
         if use_new_path:
             self._path = new_path + os.path.basename(self._path)
             self._directory = new_path
-            Settings.get_instance().update_path()
+            self._settings.update_path()
 
     @staticmethod
     def find_profiles():
@@ -57,7 +62,7 @@ class ProfileManager:
             if fl.endswith('.tox'):
                 name = fl[:-4]
                 result.append((path, name))
-        path = curr_directory()
+        path = util.get_base_directory(__file__)
         # check current directory
         for fl in os.listdir(path):
             if fl.endswith('.tox'):
diff --git a/toxygen/user_data/settings.py b/toxygen/user_data/settings.py
index 45d41bd..f879e53 100644
--- a/toxygen/user_data/settings.py
+++ b/toxygen/user_data/settings.py
@@ -1,28 +1,26 @@
 from platform import system
 import json
 import os
-from util import Singleton, curr_directory, log, copy, append_slash
+from util.util import log, curr_directory, append_slash
 import pyaudio
 from user_data.toxes import ToxES
-import smileys
+import smileys_and_stickers as smileys
 
 
-class Settings(dict, Singleton):
+class Settings(dict):
     """
     Settings of current profile + global app settings
     """
 
-    def __init__(self, name):
-        Singleton.__init__(self)
-        self.path = ProfileManager.get_path() + str(name) + '.json'
-        self.name = name
-        if os.path.isfile(self.path):
-            with open(self.path, 'rb') as fl:
+    def __init__(self, toxes, path):
+        self._path = path
+        self._toxes = toxes
+        if os.path.isfile(path):
+            with open(path, 'rb') as fl:
                 data = fl.read()
-            inst = ToxES.get_instance()
             try:
-                if inst.is_data_encrypted(data):
-                    data = inst.pass_decrypt(data)
+                if toxes.is_data_encrypted(data):
+                    data = toxes.pass_decrypt(data)
                 info = json.loads(str(data, 'utf-8'))
             except Exception as ex:
                 info = Settings.get_default_settings()
@@ -175,12 +173,11 @@ class Settings(dict, Singleton):
 
     def save(self):
         text = json.dumps(self)
-        inst = ToxES.get_instance()
-        if inst.has_password():
-            text = bytes(inst.pass_encrypt(bytes(text, 'utf-8')))
+        if self._toxes.has_password():
+            text = bytes(self._toxes.pass_encrypt(bytes(text, 'utf-8')))
         else:
             text = bytes(text, 'utf-8')
-        with open(self.path, 'wb') as fl:
+        with open(self._path, 'wb') as fl:
             fl.write(text)
 
     def close(self):
diff --git a/toxygen/util/util.py b/toxygen/util/util.py
index 33b4758..45bc345 100644
--- a/toxygen/util/util.py
+++ b/toxygen/util/util.py
@@ -3,9 +3,7 @@ import time
 import shutil
 import sys
 import re
-
-
-program_version = '0.5.0'
+import platform
 
 
 def cached(func):
@@ -33,6 +31,18 @@ def curr_directory(current_file=None):
     return os.path.dirname(os.path.realpath(current_file or __file__))
 
 
+def get_base_directory(current_file=None):
+    return os.path.dirname(curr_directory())
+
+
+def get_images_directory():
+    return os.path.join(get_base_directory(), 'images')
+
+
+def get_styles_directory():
+    return os.path.join(get_base_directory(), 'styles')
+
+
 def curr_time():
     return time.strftime('%H:%M')
 
@@ -95,12 +105,5 @@ def is_re_valid(regex):
         return True
 
 
-class Singleton:
-    _instance = None
-
-    def __init__(self):
-        self.__class__._instance = self
-
-    @classmethod
-    def get_instance(cls):
-        return cls._instance
+def get_platform():
+    return platform.system()
diff --git a/toxygen/wrapper/libtox.py b/toxygen/wrapper/libtox.py
index 752798f..a04746c 100644
--- a/toxygen/wrapper/libtox.py
+++ b/toxygen/wrapper/libtox.py
@@ -1,6 +1,6 @@
 from platform import system
 from ctypes import CDLL
-import util
+import util.util as util
 
 
 class LibToxCore: