Actually, both windows 10 and Avast were installed from scratch.
I reinstalled windows yesterday and also installed Avast. I got this avast installer from the homepage of the Avast website. During the instalation of Avast, no mention to beta were made.
Very strange I just wonder if that had anything to do with the fact that the RC3 build (which was a beta) and the regular release of avast 2016 as they both had the same build number 11.1.2241.