Upgrade Professional to Professional Plus
If you buy Professional Plus it already covers Android.
However a Pro Plus licence has to be purchased through CCleaner, you cannot purchase it in the Google Play Store.
PS. You do understand the diifrence between a Pro and Pro Plus licence?
It’s the licence that is ‘Plus’ (plus more devices and more OS’s) not the app itself.
Whether you have a Pro or Pro Plus licence makes no difference to your CCleaner Pro app.