RenÚ, I had the same problem and tried here...
For me, "don't mount" don't working in windows...
(tried to launch a software in Master System and after that choose "don't mount" again, but the same software was launched)...

Ps.: I want to suggest a option (as launch/launch embedded) called "launch without software". It's simple launch emulator without the commands for the software, I think that would be a good and simple solution and maybe not too hard to implement...
Thank you! smile


"A user interface is like a joke. If you have to explain it, it's not that good."