Welcome aboard PostieManPat. You're doing fine.
The other product uses DAO (Disc At Once) to duplicate an ENTIRE DISC IMAGE. They don't allow importing individual tracks, or playing songs. They only duplicate a disc.
Microstudio is written to import individual tracks using TAO (Track At Once) a very different method, which most drives will not support for CDG discs. That's what you are experiencing.
It is very complex to change Microstudio to work with DAO and decode the entire disc image back into tracks. I'm not expecting us to offer this. However, we may be able to read/write with more drives before many more months.