If you can make the order I just did as Orders Status Processing or Delivered I can see more ...

More than likely the info on the download is not showing because of the Orders Status settings ...

I used the CC checkout ... and that is probably set to Pending ...

The current bug in v1.3 that is fixed in v1.3.0.2 would be showing right now that the Download is pending until you update the order ...

Have you left the default settings for the orders status on PayPal?

Note: if this was an upgrade, uninstall and reinstall PayPal and reconfigure it ...