Thanks, I tried everything before this. I found the entry for paint.net and deleted it. There were a lot of keys left over in it too. They should really improve their uninstaller because their program is great.
I recently uninstalled Paint.net from my computer, which was recognized by CCleaner and put in the Cleaner's Applications Tab. Now that I uninstalled it an entry for Paint.net still remains. I've removed all folders in Program Files and AppData that relate to Paint.net and yet the entry is still in CCleaner. I even tried reinstalling but it's still there. How do I remove this entry? Thanks.