False flag, it doesn't have anything like it in it's database so it's trying to prevent a day zero attack. (Granted Avira isn't that great) Just disable it, install the game, and re-enable it.
My AVG also detected a virus during the update. Cloud.5 or something along those lines. Not allowing/excepting it would make BNGD crash.
We are currently working on fixing those false flag things up, remove some of the now unneeded programs and contact some AV producers.