It was not working for me at first then it worked after saving closing, restarting.
Look in C:\Users\Public\Ticket\Band-in-a-Box DAW Plugin Folder Locations.txt
you can set it manually there.
It will also ask to move them if you Save As.

Code:
BBLocation=C:\bb\
RealTracksLocation=E:\bb\RealTracks\
DrumsLocation=E:\bb\Drums\
SavedTracksLocation=C:\BB SavedTracks\SavedTracks\


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