[2021] Game broken after that stupid update!

So after the latest 'Update' AND Hotfix my game is broken! I play in VR with HOTAS. I lost all my fire controls but managed to get them back in my AspX, but the SRV is totally broken! Can't assign anything! All I can do now is drive... Won't switch between Analyse & Combat mode, won't scan, won't fire. Tried reconfiguring, rebooting etc. No joy...

Also, every 10-15 seconds the image 'stalls' & hangs up for maybe half a second! Constantly! It's infuriating & now unplayable. Even if I wanted to just fly around & explore I can't cos the feckin' video hangs.

If anyone has workarounds I'd love to hear! Worked fine before the bloody update! Gutted right now...