John,
Just in case you don't know ...
To be able to get midi-only styles in later versions of BIAB, it's necessary to disable two auto-substitute options.
These are ...
1. Under "Opt | Preferences | Realtracks"

2. Under "Opt | Preferences | Realdrums"

Without these options disabled, BIAB will automatically substitute Realtracks and Realdrums in place of midi.
Regards,
Noel