Wow! Is this is a coincidence.
I just did the exact same thing and had the exact same question.
Weird.

I just started to take private voice lessons and the instructor says she "must" have piano sheet music of the songs I want to work with. (I'll argue that point later with her.)

Anyway, MusicNotes had two of the first two songs I want to work on. But one of the songs is in a different key than what I play/sing.

The 'mtd' file is a Midi format so I thought I could open it with BiaB and Voilà! change the key.

But no such luck.

What about it Peter?