I’m not sure if there is a topic like this, at least I didn’t find it, so:
I received the download link, but when I go to the page it just says: “Wir konnten die genannte Bestellung nicht finden.”, in english: “We couldn’t find the order.”.
Okay, just for future reference: If this happens: Another mail will arrive a few minutes later in German, at that moment the downloadlink will work