Long time since i was here, and am very pleased to see the Theatre View!
Oddly, this thread does not seem to provide Instructions to install customised "Theatre Views".
I have followed both links, and neither give instructions. Perhaps I am a bit blind here... but I cant see the instructions.
I found somewhere else, that the path to extract each custom Theatre View to is
C:\Program Files (x86)\MusicBee\Plugins\TheaterMode.List
And it does not work to extract the folder containing the custom view, but one must extract the contents of the folder, xml files and the SharedArtwork folder to that path.