+1 everything Rob said !

How many users have used more than one Biabvst in their DAW ??

That's why in the new GUI I showed midi channel choice so if you are using one instance you can set the channel of that midi track, so it will rechannel the midi tracks in the local folder to the selected channel so as it's sending to the DAW where you can route that channel to any track.
Guide: Using Multiple Biab Plugins
You can put a Biabvst on each track generating a midi track in each plugin with different virtual instrument after the Biabvst.
In Reaper I just set up the Biabvst on one track and load the chords,
now just duplicate the track as many time as you like,
set a virtual instrument on each track,
generate up a midi track in each Biabvst,
double click on each midi icon to set them to sync play
(in the new GUI you don't need to do this as it will play sync by default unless you click the mute button (yes a Mute button with an M that Mario will see no problem without having to distinguish colors) to mute tracks or hit the Host button to stop sync playback).
If track 4 don't sound right generate it up again or have a multiriff midi and use the S solo button in the new GUI to solo the riff you like.
Will that give you enough midi tracks now ??

The whole idea of the Biabvst is for this
Quote:
bowled over by 2020
Originally Posted By: justanoldmuso
now done several songs.
i couldnt do any better if i used a big studio ;like i used to.
wowser !!!!!!!

so to give those in the studio "Session Tracks Pro" vst not the old name "Band in a Box" that is associated with auto accompaniment from the 90's and a nightmare to workout and learn.
You can't tell a Studio using Mac to use RealBand !

Biab Track Injector for Reaper
Free Biab Chord Picker Tool