Well, DavidR estimates the priority of fixing this bug to be low.
He is allowed to have this opinion and probably the decision makers of the company even agree with him.
I was satisfied with the features of Avast's antivirus software for a long time.
Over time, the ads for other proprietary features and programs became more and more annoying.
However, this last case (pop-up of browser window for self-promotion in connection with registration "pollution") is really too much.
Especially the arrogant and cynical way of dealing with customer complaints.
When something formerly good is no longer good, then it is sometime time to let go.
Goodbye Avast, it WAS nice with you, but now you see me go.