As of CCleaner 2.00.500, I seem to be having an issue after updating to this version where if I attempt to actually "Fix" one or all registry issues, the buttons do nothing. About 5 minutes before updating from version 2.00.4xx, I ran the same registry scan and all issues were fixed successfully, but after updating the buttons are clickable, but have no action present when pressed. The cancel button works fine, and if you choose to "Fix" all selected items, the dialog still pops up asking you if you are sure you want to do this, but after that nothing happens.
I'm going to take a guess and