Please download new minor update of Multi Room Audio Player. This is a list of all improvements:
[+] Added: New API method GetPlayersShortInfo to get only main player or players info;
[+] Added: Ability to Unregister software. If you want transfer license you need unregister software first;
[-] Fixed: Getting current track info via API;
[-] Fixed: Selecting track on pause.
You can view all version history here.