Hi,
Reading the documentation for payplans and integrations, Payplans does work / integrate with K2 and Phoca Downloads and many more, but using (payplans+k2+phocadownloads) together seems not possible, let me explain:
Looking at the documentation for phocadownloads
on your website, i can only choose joomla categories and not K2 categories in the phocadownloads settings.
I have installed k2 app, and phocadownload app and configured them after reading your documentation. In the phocadownload app where i have to enter "add access rights of categories" i should be able to choose my k2 kategories and not limited to only joomlas categories, since i am only using k2 categories. So from my point of view, using payplan, k2 and Phocadownload all toghether is not possible, or have i missed something ?