For sanity purposes, this is what my mixer looks like when I load your song file:



Since you are able to manually add the Abbey Road plugin to a song, I am curious when exactly does the problem start? For example:
1 - if you go to File > New, then re-load the song file again, is the plugin loaded?
2 - or does the problem only start if you exit Band-in-a-Box, and run it again? (ie the problem starts after starting a new program session)


What happens if you try to load the plugin from a TGS file?


There are 3 different versions of the Abbey Roads plugin, so perhaps you could try loading these TGS files and see what happens. Perhaps try loading them onto a different track instead of the Master track.

https://www.dropbox.com/s/jf602muczdtdi1n/Waves%20Abbey%20Road%20Studio%203.tgs?dl=1

https://www.dropbox.com/s/oum5k16p3u3mgzu/Waves%20Abbey%20Road%20Studio%203%205.1.tgs?dl=1

https://www.dropbox.com/s/kg55dng79dt04pg/Waves%20Abbey%20Road%20Studio%203%207.1.tgs?dl=1

Blake

PG Music Inc.