We've had several feedback reporting us issues when the OS can't "remember" settings of the app. As an example this results in showing rating or newsletter window with every lauch or quit. The issue is most likely caused by a rare OS X bug.
To fix the issue you need to reset the app as described below.
- Make sure you quit the app
- Open Terminal app (start typing it in Spotlight) and delete container with the following Terminal command (you can copy-paste it):
rm -R ~/Library/Containers/com.rockysandstudio.app-for-facebook-messenger/Data/Library/Application\ Support/
- Delete defaults by running the following command:
defaults delete com.rockysandstudio.app-for-facebook-messenger
- Restart your Mac
- Start the app
In case if you have further issues please contact us.