I wouldn't trust JVC Powertools, since I don't find anything that relates to it on a Google search. Are you sure its safe?
If you need a registry cleaner, use CCleaner. It works for me and millions of other users 
CCleaner will ask you to backup the registry keys that are going to be cleaned - and yes, you can specify the folder they are saved into 
Oh, and I think posts like this belong into the Software Aid & Support area..