First time posting, with thanks for the brilliant program!
One trick for less technical people is to make sure it is in the MusicBee folder in Program Files, not a MusicBee folder elsewhere. For example, in Windows 10 there will be a "Music" quick link with a "MusicBee" folder in it... but this is the WRONG place to put the file. It needs to go in the MusicBee folder with the executable. If you don't know where this is, you can right click on the shortcut you use to launch MusicBee and select properties and it should tell you.
Hope this helps a few people!