After updating to the last version 5.00.5050, the free version, I'm disappointed to discover it doesn't work anymore: launching the cleaning process it starts but never stop, the app hangs up, there's need to go to Task Manager to close the process.
Uninstalled, rebooted, reinstalled: same problem.
Downloaded the portable version: same problem.
I've been obliged to go back to the previous version, where I will stay from now on, unless someone can give me a solution.
DIY answer and temporary solution: the English portable version did the trick. It seems the bug is in other languages version (mine is Italian)