I just just tried using Ripper with unRAID but I revived this error (I am guessing the Beta key has expired as I have read from other forums that this key expired end of May) unless I have understood it wrong
MSG:5021,260,1,"This application version is too old. Please download the latest version at http://www.makemkv.com/ or enter a registration key to continue using the current version.","This application version is too old. Please download the latest version at %1 or enter a registration key to continue using the current version.","http://www.makemkv.com/"