If you have set an app to act as the default app on your Android device for a certain file or function, it will forever be the default app until you clear it. If you need to change a default app, you can clear it using these steps.
Note: These steps are for Android 6 (Marshmallow).
- From your apps, open “Settings“.
- Select “Applications“.
- Select “Application manager“.
- Select the app that is set as default.
- Tap “Set as default“.
- Tap the “Clear defaults” button.
After the default is cleared, you can make a different app the default by trying to perform the function the app handles such as opening a file or web address, you will be prompted at that time to set a new app as the default from the “Complete action using” screen.