I am having the same issues. I was using Paint.net and really enjoyed it. A week ago, it wouldn't allow me to go into the program. After a number of unsuccessful attempts, I decided to uninstall the program and reinstall it. I am now having the same issues as the creator of this thread. I just tried the link in the post above, but had to click "None found" as paint.net is not shown after running the scan. I hope to find a fix so I can get back to using the program.