You can try it for yourself if you have REAPER.

https://www.dropbox.com/s/g28fd8zss4me8h8/Biab-Live-Arranger-WMA.mp4?dl=0

You can open these in Reaper (versions from 6.57 that is wma compatible)
Right click Save Link/Target As
_TXBLZPN Demo - TexasBlues Rock with acoustic piano.rpp
_BOSSGS Demo (ALL REALTRACKS - ElGuitSolBossa,PianoBossa,AcBassBossa).rpp
It will be looking on Drive E: but you can point it to your bb folder location.
It will load all the tracks but might not have peaks so
In Reaper menu > Actions > Show Action List
Peaks: Build any missing peaks
or
Peaks: Rebuild all peaks

During playback just click on the time line where the region starts and it will change smoothly at the start of the next bar to that region.
No wma files are in Reaper they are all played back from their source location on the Biab USB drive.
This is how the BBPlugin Standalone could work, it would just load all the track data for each track in the styles same as Reaper is doing.

Another way to look at it is if you go to a RealTrack folder and drag all the wma files into Reaper on one track and you chord the regions out, whatever region you enter it will go there smoothly and play.
Or look here https://www.pgmusic.com/forums/ubbthreads.php?ubb=showflat&Number=740677
download one of these and put it in Reaper, it has nearly 5000 bars 2.5 hours of material, if it's playing bar 10 and you click bar 4700 it will go there smoothly.

Try it out and let me know how you go.

In REAPER Options > Preferences > Seeking