Well, my suggestions were based on what Vlk recommended about avast 7 RC -> final and AIS and non-English versions.
The problem might be related to the new "account" / registration. Since this is very new and just released an hour ago, maybe you should wait for some Avast Team member to post some answer (here or in the other topic already opened with this same problem, or in the main announcement topic). Keep following the forum, and I'm sure eventually the answer will appear, if not today, tomorrow. They won't leave so many users with no answer. Be patient.