diff --git a/app/src/main/java/com/github/axet/audiorecorder/activities/MainActivity.java b/app/src/main/java/com/github/axet/audiorecorder/activities/MainActivity.java
index d848b98..060080b 100644
--- a/app/src/main/java/com/github/axet/audiorecorder/activities/MainActivity.java
+++ b/app/src/main/java/com/github/axet/audiorecorder/activities/MainActivity.java
@@ -188,7 +188,6 @@ public class MainActivity extends AppCompatThemeActivity {
         if (recordings.onOptionsItemSelected(this, item))
             return true;
 
-        final SharedPreferences shared = PreferenceManager.getDefaultSharedPreferences(this);
         switch (item.getItemId()) {
             case R.id.action_settings:
                 startActivity(new Intent(this, SettingsActivity.class));
diff --git a/app/src/main/java/com/github/axet/audiorecorder/activities/RecordingActivity.java b/app/src/main/java/com/github/axet/audiorecorder/activities/RecordingActivity.java
index c738a76..c93debd 100644
--- a/app/src/main/java/com/github/axet/audiorecorder/activities/RecordingActivity.java
+++ b/app/src/main/java/com/github/axet/audiorecorder/activities/RecordingActivity.java
@@ -506,9 +506,8 @@ public class RecordingActivity extends AppCompatThemeActivity {
             start = false;
             stopRecording(getString(R.string.recording_status_pause));
         }
-        if (a != null && a.equals(ERROR)) {
+        if (a != null && a.equals(ERROR))
             muted = new ErrorDialog(this, intent.getStringExtra("msg")).setTitle(intent.getStringExtra("title")).show();
-        }
     }
 
     @Override
diff --git a/app/src/main/java/com/github/axet/audiorecorder/app/AudioApplication.java b/app/src/main/java/com/github/axet/audiorecorder/app/AudioApplication.java
index 12bd475..8475715 100644
--- a/app/src/main/java/com/github/axet/audiorecorder/app/AudioApplication.java
+++ b/app/src/main/java/com/github/axet/audiorecorder/app/AudioApplication.java
@@ -399,7 +399,7 @@ public class AudioApplication extends com.github.axet.audiolibrary.app.MainAppli
                     else
                         edit.putString(AudioApplication.PREFERENCE_ENCODING, FormatFLAC.EXT);
                 }
-                edit.putInt(PREFERENCE_VERSION, 3);
+                edit.putInt(PREFERENCE_VERSION, 4);
                 edit.commit();
                 break;
             case 0:
@@ -412,6 +412,9 @@ public class AudioApplication extends com.github.axet.audiolibrary.app.MainAppli
             case 2:
                 version_2_to_3();
                 break;
+            case 3:
+                version_3_to_4();
+                break;
         }
     }
 
@@ -468,4 +471,13 @@ public class AudioApplication extends com.github.axet.audiolibrary.app.MainAppli
         edit.putInt(PREFERENCE_VERSION, 3);
         edit.commit();
     }
+
+    @SuppressLint("RestrictedApi")
+    void version_3_to_4() {
+        SharedPreferences shared = PreferenceManager.getDefaultSharedPreferences(this);
+        SharedPreferences.Editor edit = shared.edit();
+        edit.remove(PREFERENCE_SORT);
+        edit.putInt(PREFERENCE_VERSION, 4);
+        edit.commit();
+    }
 }