How to register and activate CCleaner Professional
https://support.ccleaner.com/s/article/how-to-register-and-activate-ccleaner-professional?language=en_US
WEBClick Activate. Otherwise, if a license is already registered in the CCleaner app, but you need to activate a new replacement license key, you can do this using this method: Open CCleaner > click Settings > Subscriptions. Insert your license key in the Activation Code box. Click Activate. When the registration dialog opens, enter your CCleaner ... login
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