I have this latest module installed : [url removed, login to view]
I have POSTFINANCE test Business account (i will provide all login and pass details)
I have added a test product - [url removed, login to view]
After everything will work i will try to buy it and test.
I was contacting official module developer but seems he is busy, and said module have no bugs.
I did all step by step manual as in module description.