I really had exe file association on my mind… I don’t remember the name of the software, but it was some kind of access manager.

As for the warning… well, I think that Cleaner is a tool for cases when something is wrong - not just to “check”. If it should be a new feature, I’d rather target it for avast itself, not the Cleaner. (Besides, handling unknown viruses may theoretically have dangerous consequences - if an active virus were checking whether somebody had changed its associations - and at that point triggered some nasty payload… it wouldn’t be very nice).