As far as I can tell if you have multiple versions of a movie i.e. Theatrical vs Director’s Cut, there is no way to select which one to playback on the Amazon Firestick app. The main reason I have switched from Plex to Jellyfin is because it has a better method of version selection when watching a movie. If anyone has figured out a solution to this problem please let me know. Thanks in advance.
I don’t believe we have this yet. Let me check with the developer.