well that is what i have done.
last time i went around this issue, and killed the complete library to reread it. that works. but is simply not convenient.
ok i have removed the folder from the library and inserted it again a view minutes later, and it added all to the library. all seems ok for now? !
i have removed another folder with 200 songs, while running music bee, it correctly removed them from the library. i closed music bee, and put the folder back, music bee does find it. so it seems ok,
it seem the patch can somehow make it work. i am not fully convinced. i add music from time to time. if i get in trouble again i let you know.