Avast! does not want to update...and im having false positives

My machine running the beta seems to not have been affected with false positives. It’s still trucking fine.
Should I just update my laptop to the beta? I really like how the beta runs.

Do I have to do a full system scan? Despite the false positives issue? I really don’t want to dedicate my machine to that for a few hours.

I only run a Quick scan when I install avast!

The resident protection is good to dedtect infections that try to run.