The Plugin is still in development but is getting there.
There is a suggestion here I was trying to get them to implement
A VST to send Tempo/Play/Stop/Loop/Continue to main Biab app from DAW
it should be relatively easy to do.
What you can do with the BBPlugin is have another instance of the Plugin start sync at any bar by clicking the little arrow under Sync.
This way you can have another style or time signature and start sync at the bar where there is a time signature change, you can copy chords from one instance to the other.
You just uncheck the lead-in and ending if the song section does not need it.
The only issue is with the current version it's cutting the last bar off too soon so you don't get a seamless play, BUT hopefully that should be fixed soon.
This also allows you to regenerate sections, this is quicker than generating the whole song.
With generate time in the Plugin compared to Biab, Biab will chose the sections of RT from the source files, generate into RAM then start playing, BUT the Plugin will do that, wait for it to finish generating the whole track, then render to wav.
Here's is a better way that would be quicker than Biab:
Instant Generate & Play of RealTracks/Drums in BiabVST