You would follow theta_wave's steps 1-4 and then type
mklink /D .\InternalCache C:\Users\Tom\Documents\Musicbee
that creates the actual link (mklink means make link) from where MB thinks the files are to where they really are. The "/D" tells it it's a directory and not a single file (the default).
Now, when you browse to
C:\Users\Tom\Dropbox\DropsyncFiles\music\MusicBeePortable_3_1\AppData\ in file explorer, you'll see that the "InternalCache" folder still appears but with a little arrow in the corner of the icon showing that the data isn't really there but in the new location. If you click into the folder, you'll be taken to C:\Users\Tom\Documents\Musicbee. But any programs that go looking for it at C:\Users\Tom\Dropbox\DropsyncFiles\music\MusicBeePortable_3_1\AppData\InternalCache will still be able to find it.
Last Edit: October 15, 2017, 11:04:25 PM by frankz
A smile is happiness you'll find right under your nose.