I paid for pro but it still asks me to upgrade and when I try to restore the purchase, it leads me just to the FAQ section. I tried to troubleshoot following the steps in the help section but to no avail. Please help.
There are a number of reports of licencing/updating issues with CCleaner for Android.
Aparently there is a new version which is meant to fix it:
https://community.ccleaner.com/topic/65352-ccleaner-android-no-key/#comment-344084
If you are still having problems then you can contact support using the form here:
https://support.ccleaner.com/s/contact-form?language=en_US&form=general