How do I use CCleaner to restore a registry backup?

How do I use CCleaner to restore a registry backup?

Did you make the back up with CCleaner?

If yes, go to the saved backup (which is stored by default in your documents folder), double click it, or right-click and select merge.

The name of it with starts with cc and thensome numbers which happen to be the date and time you made the backup on

Thank you