version 2.21 has just been sent to the shops. It should be deployed shortly.
About the BVars… this feature is a little more involved than usual and strictly experimental. It will probably not work for all BVar implementations out there (but there is a work around described in the manual if it doesn’t)
Please make sure (!) to read the chapter about that in the AAO manual for MSFS. Also, it may be a good idea to run AAO “As Administrator” when creating configurations with the BVar module.