I had the same problem but it is an easy fix.

Unfortunately, i have already switched back to the older version (for a different reason) so i no longer can go to the screens to tell you exactly what to do.

I will however go from memory in order to try and help you.

On the Avast home screen…there are about 4 or 5 options on the left hand side…go through each of those menu selections until you see that one of the browsers have been turned off, while all of the others are on. You shouldn’t have any trouble in finding it athough it may take you 2 or 3 minutes to find.

Once you turn it on manually, everything will be fine.

Paul