comment réinstaller CCleaner Professionnal avec ma clé de licence?
Dpwnload an installer from here, either the latest CCleaner7 or the older ‘Sunset’ CCleaner v6.39:
Double click the downloaded installer to install CCleaner Free,
In CCleaner7 go to Settings > My Subscription to enter your key.
If you have CCleaner v6 then it’s in Options > Licence Key to enter your key.