Grime Fighter didn't work at all, waited for the update, still nothing happens

Grime Fighter didn’t work at all on my computer, waited for the update, it’s now called Avast Clean up. Only thing I get is a note to update, but nothing happens when I click on it. What do I do? I think I want my money back.

This question would be better placed in the CleanUp/GrimeFighter sub-forum, https://forum.avast.com/index.php?board=63.0.