On my portable installation, something is scrambled with the plugins. I get this error every time I go to Plugins in preferences:
MusicBee v3.3.7261.33657P (Win10.0), 22 Nov 2019 20:59:
System.NullReferenceException: Object reference not set to an instance of an object.
When I hit ok, it goes on as if nothing is wrong, but then I get this weird Plugins screen:
Not only is Additional Tagging & Reporting Tools on there twice, but it's literally the only plugin in the directory right now. Discogs and minilyrics aren't there at all. Theater mode was there, but I tried adding all the plugins back in and that cleared up the error. So then I disabled/uninstalled all of them and deleted all the files except for TagTools, and the error came back plus the results you see. Very odd.