Try it without forcing MB to write its (blank) cache data for those tags to the files themselves first.
I did so.
Unfortunately it does not help.
I found
this guy who has had the same problem.
Maybe he could sum up my problem better...
Are these files in your MB library?
I'm sorry, but I guess I dont get this correctly...
Which files are in my MB library?
In the MBlib is MusicBeeLibrary.lyrics, MusicBeeLibrary.mbl, MusicBeeLibrary.ini, and MusicBeeLibrarySettings.ini
My Music is stored in another folder.
But I did: >>File -> Add Files to library<< and that was succesful.
I hope that answers your question.