diff --git a/src/history.py b/src/history.py
index abcb58b..9caf2be 100644
--- a/src/history.py
+++ b/src/history.py
@@ -23,12 +23,15 @@ class History(object):
         path = settings.ProfileHelper.get_path() + self._name + '.hstr'
         if os.path.exists(path):
             decr = LibToxEncryptSave.get_instance()
-            with open(path, 'rb') as fin:
-                data = fin.read()
-            if decr.is_data_encrypted(data):
-                data = decr.pass_decrypt(data)
-                with open(path, 'wb') as fout:
-                    fout.write(data)
+            try:
+                with open(path, 'rb') as fin:
+                    data = fin.read()
+                if decr.is_data_encrypted(data):
+                    data = decr.pass_decrypt(data)
+                    with open(path, 'wb') as fout:
+                        fout.write(data)
+            except:
+                os.remove(path)
         db = connect(name + '.hstr')
         cursor = db.cursor()
         cursor.execute('CREATE TABLE IF NOT EXISTS friends('
diff --git a/src/menu.py b/src/menu.py
index a6d0b0f..689d1d6 100644
--- a/src/menu.py
+++ b/src/menu.py
@@ -654,13 +654,18 @@ class PluginsSettings(CenteredWidget):
 
     def show_data(self):
         ind = self.comboBox.currentIndex()
-        plugin = self.data[ind]
-        descr = plugin[2] or QtGui.QApplication.translate("PluginsForm", "No description available", None, QtGui.QApplication.UnicodeUTF8)
-        self.label.setText(descr)
-        if plugin[1]:
-            self.button.setText(QtGui.QApplication.translate("PluginsForm", "Disable plugin", None, QtGui.QApplication.UnicodeUTF8))
+        if len(self.data):
+            plugin = self.data[ind]
+            descr = plugin[2] or QtGui.QApplication.translate("PluginsForm", "No description available", None, QtGui.QApplication.UnicodeUTF8)
+            self.label.setText(descr)
+            if plugin[1]:
+                self.button.setText(QtGui.QApplication.translate("PluginsForm", "Disable plugin", None, QtGui.QApplication.UnicodeUTF8))
+            else:
+                self.button.setText(QtGui.QApplication.translate("PluginsForm", "Enable plugin", None, QtGui.QApplication.UnicodeUTF8))
         else:
-            self.button.setText(QtGui.QApplication.translate("PluginsForm", "Enable plugin", None, QtGui.QApplication.UnicodeUTF8))
+            self.open.setVisible(False)
+            self.button.setVisible(False)
+            self.label.setText(QtGui.QApplication.translate("PluginsForm", "No plugins found", None, QtGui.QApplication.UnicodeUTF8))
 
     def button_click(self):
         ind = self.comboBox.currentIndex()
diff --git a/src/profile.py b/src/profile.py
index a809cac..3074f85 100644
--- a/src/profile.py
+++ b/src/profile.py
@@ -167,7 +167,7 @@ class Friend(Contact):
     def dec_receipt(self):
         if self._receipts:
             self._receipts -= 1
-            self.mark_as_sent(False)
+            self.mark_as_sent()
 
     def load_corr(self, first_time=True):
         """
@@ -212,22 +212,13 @@ class Friend(Contact):
         else:
             return ''
 
-    def last_message_owner(self):
-        messages = filter(lambda x: x.get_type() <= 1, self._corr)
-        if messages:
-            return messages[-1].get_owner()
-        else:
-            return -1
-
-    def not_sent_messages(self):
+    def unsent_messages(self):
         messages = filter(lambda x: x.get_owner() == 2, self._corr)
         return messages
 
-    def mark_as_sent(self, mark_all=True):
-        for message in filter(lambda x: x.get_owner() == 2, self._corr):
-            message.mark_as_sent()
-            if not mark_all:
-                break
+    def mark_as_sent(self):
+        message = filter(lambda x: x.get_owner() == 2, self._corr)[0]
+        message.mark_as_sent()
 
     def clear_corr(self):
         """
@@ -552,14 +543,13 @@ class Profile(Contact, Singleton):
         """
         friend = self.get_friend_by_number(friend_number)
         friend.load_corr()
-        messages = friend.not_sent_messages()
+        messages = friend.unsent_messages()
         try:
             for message in messages:
                 self.split_and_send(friend_number, message.get_data()[-1], message.get_data()[0].encode('utf-8'))
+                friend.mark_as_sent()
         except:
             pass
-        else:
-            friend.mark_as_sent()
 
     def split_and_send(self, number, message_type, message):
         """
diff --git a/src/settings.py b/src/settings.py
index 514dde8..a589d35 100644
--- a/src/settings.py
+++ b/src/settings.py
@@ -19,9 +19,9 @@ class Settings(Singleton, dict):
             with open(self.path) as fl:
                 data = fl.read()
             inst = LibToxEncryptSave.get_instance()
-            if inst.is_data_encrypted(data):
-                data = inst.pass_decrypt(data)
             try:
+                if inst.is_data_encrypted(data):
+                    data = inst.pass_decrypt(data)
                 info = json.loads(data)
             except Exception as ex:
                 info = Settings.get_default_settings()