[Registry Cleaner - unused file extensions]

Hi y'all,

 

When I run the registry cleaner it says:

 

Unused file extension, .sav (.tmp etc.), HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.sav (.tmp etc.)

 

I know that Windows uses .TMP files and all my games have .SAV files. Will there be a problem if I delete these registry entries as CCleaner suggests?

 

Thanks for your help.