I have the same problem. The license autorenewed on Google Play on the September 21st, but I do not have Pro funcionality now.
@Morkeleb Have you solved the problem since September?
November: same situation
I payed for Pro but it didn't start to work yet. Again. Pls help.
Hello! My pro account didn't work after payment 27 november 2020. I have this problem every year. Please - do something!