I agree with Audiotrack. I cannot see that m(add9) chords are part of BIAB's repertoire at this point in time. Have you tried Fm69? While is adds a D to the sound, it might actually sound okay.

The other possibility that I can think of is to use Fm, and generate the track. Next, go through and use playable Realtracks to manually add the G note in one of the major instruments (e.g. piano or guitar) for each of the Fm chords that you want to be Fm(add9). The 9th probably won't need entering in all instruments since it is usually better not to double dissonant notes across too many instruments. After you have done this, you could then freeze the track to keep your work.

MY SONGS...
Audiophile BIAB 2025