I purchased the Music Maker Premium holiday deal (download version) that included Sound Forge but now I don't have a serial number for Sound Forge and can't use the program. Any ideas?
I assume this is Sound Forge Audio Studio you are referring to? If so, the needed serial key should have been in the email you would have received when your purchase of MM was confirmed. Have you carefully checked it all the way through? The key for SFAS may well be towards the end of what can be quite a long email!