Hello
Here is a video explaining how to register avast 2014 (video in French, but you just have to do what you see).
http://blog.formatizo.fr/post/2013/06/03/Comment-activer-Avast-(version-gratuite)
Regards
You may post it in French forum section http://forum.avast.com/index.php?board=23.0
Ouuuups. You’re right 
I will post in the french forum.
Thanks