I need to transfer my CCleaner Pro from an old to new Laptop without baying new licence
What is the procedure
Make a note of your licence details, you can find them in Options>About>License Information.
Install CCleaner Free version on the new machine. You can download the installer from here: https://www.piriform.com/ccleaner/builds
Once installed open CCleaner Free and go to Options>About>Upgrade to Pro.
Input your licence details as prompted and click on 'Register'.
Once you have registered CCleaner on the new machine, uninstall it from the old one. Unless you have a licence for more than one machine.
(You should realy do that before re-registering it on the new one, but you get some leeway to make the change as long as you don't do it too often in a short time).
If you want to you can then install an unregistered CCleaner Free on the old one.
The general information and help with registering CCleaner can be found here: