I have the same problem. When I place item in cart then PayPal comes and demands payment, then I still am unable to find the file to download. Can't find a place where I can enter my username and four digit pin.
1. Add to cart all files that you want to download. All POIs are listed here: https://poi.gps-data-team.com/
2. Log in with your email address and PIN (guests)
3. Go to https://poi.gps-data-team.com/
4. Press the download button -> GPI / DB3 to save your personal one-click-updates POI file to your download folder