If you install iObit's malware program, MusicBee will not be able to find your files and play them. I am assuming there is a setting somewhere to allow this through the malware protection, but I have no clue where to even begin to look for that.
So, for the time being, I can not use malware if I want to use MusicBee.
Groove music works fine with the malware program, so it must be MusicBee that is not allowing things through?