Bitdefender not working on Macbook running recent supplemental to Catalina 10.15.7

librarian

I installed the supplement to Catalina 10.15.7. When I tried to use Bitdefender to run a quick virus scan, nothing happened. When I tried to leave the Bitdefender screen, I got the colored bouncing beachball. BD just stopped working entirely. I can't open it without the same thing happening. Had to do a "force quit" and shut down the Macbook Air. Then, restarted to get rid of the Bitdefender window.

Got no help so far from BD when I sent a message.