How to select default app for any file (e.g mp3)?
1. First open any mp3 file from music folder.
2. Now, menu pops out showing application that can play this file.
3. Mark ‘Use default for this action’ and select the app ( like poweramp) to make it a default app for that file.
How to remove default app for any file ?
1. Select setting icon.
2. Go to application manager.
3. Select app that was previously selected as default app for any file.
4. Now, select button ‘clear defaults’.
Here is short video to illustrate above steps.