Please try to find a solution for app-lock-style as soon as possible. The way it behaves since the last update left it useless for me. And this feature was one of my motivations to upgrade to premium. Apps with depending/related access rights don't work anymore, since the repeated request for unlocking just breaks the affected app start. I currently have to disable this feature completly, to have access to all of my apps (which i used to have locked).
Another thing: with enabled app-lock, but no app selected, I'am also requested to enter the unlock code when entering the app-lock settings page. This doesn't appear to make sense, since avast itself is not among the locked apps... I somehow feel, the app-lock is broken in general, since its behaviour does not feel userfriendly.