I finally got a response from avast customer support. As you can see, it doesn't resolve any confusion over this issue. Unbelievable.
Hello archaeo,
Thanks for your email. I have been assigned with resolving your issue. Firstly let me apologise for the delay in the response time.
I am afraid we do not support free users, free users must use our forum,
Also, your version of Avast is too old, we no longer support this, unfortunately I do not know what will happen when your licence expires,
Many thanks for your understanding,
Best regards,
Steven
The Avast Support Team