I"ve just finished installing and setting up SF15 (Windows 10 64 bit). When I open it, it says "The M-Audio M-Track 2x2 is missing, or in use by another application". I still have SF11 installed, but it's closed. I've updated the M-Track drivers, and I've tried de-selecting the M-Audio in SF11, but still the same message. Any ideas? Thanks so much...
Bill