I have changed my email address and can no longer access my license key

Can anyone tell me how I can get my CCleaner license key if I no longer have the email address I used to subscribe to CCleaner ? I have changed the provider and forgot to change the email address before.

Unfortunately, I noticed this after I upgraded my PC with a new Win11 and now have to enter the license key for CCleaner?

Appreciate your support on this.

As it mentions here

https://support.piriform.com/hc/en-us/articles/360020675012-What-happens-if-I-change-my-contact-details-or-bank-details-#2-it-allows-our-license-lookup-page-to-work-correctly--0-3

Contact ccleaner via email about this with the relevant details.

support@ccleaner.com