Cant cancel my ccleaner subscription

CCleaner for Windows
1

There is no manage subscription button showing

2

Please contact ccleaner via email for help with this..

support@ccleaner.com

3

the link provided gives a "oops page not found message

4

see this post:

https://community.ccleaner.com/topic/65260-cant-turn-off-auto-extension/?do=findComment&comment=343838