i forgot my email adress where i bought ccleaner pro subscriction

CCleaner for Windows CCleaner Windows Help Requests
1

i have payment recipt as well

2

If you just want to register it you just need the key

https://support.ccleaner.com/s/article/how-to-register-and-activate-ccleaner-professional?language=en_US

or if you need to give other info, contact them through here

https://support.ccleaner.com/s/contact-form?language=en_US&form=general

or is this your problem?

https://community.ccleaner.com/topic/65958-no-puedo-activar-ccleaner-pro-error-alpha-0xab000003/#comment-345789

https://community.ccleaner.com/topic/65952-ccleaner-premium-will-not-get-registered