My workaround is to use Am in the song, import the BiaB file into Sonar, or any DAW that you use, RB will work, and manually add the 9th. This works with MIDI but not RTs.

If you play keyboard or guitar you could mute/delete the keyboard/guitar RT and play your own instrument adding the minor add nine. You may also be able to pitch shift the bass part to add the ninth in a bass line. Again I do this in my DAW.

I hope this helps.

Doc-take it easy John this is just a sharp scalpel. It will not cut deep so don't worry.
Me-I'm not John
Doc-I know, I am!

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware