I have about 17 previous updates in my Ccleaner folder. Can you delete all but the latest, or should you just leave them there?
Do you mean the setup executables? If so you can delete any or all of them. You can always download an old version from filehippo, but none of the setup exes are needed for CCleaner to run.
If you mean CCleaner.exe then you only need the latest version.
ETA: just noticed it's your first post - welcome to the forums
Thanks for the welcome and quick response.
Regards