If ccleaner would have a cleaner who deleates files permanently so that no one ever can recover the data like its in Revo Uninstaller evidence Remover!! and after the original software uninstaler uninstals the app, ccleanes should scan the hard drive for files and folders which didnt uninstal.
Select Secure file deletion (1 pass) in the settings, and include the file you want to be cleaned. (don't forget to tick the "Custom files/folders" checkbox)
If the files you want to delete permanently are already deleted, tick the Wipe Free Space checkbox (it will take some time)