On the final step of the order screen, it does say that you should make an email to support |at| vorpx com with your Name, Email address and the code on the registration screen that comes up at first. If you didn’t send that email and are waiting for an automatic “i’ve paid now send me my code”, I don’t think it will send one as they need the registration key that is generated by the software based on your hardware information.
I sent this and had my code in like 30 minutes (GREAT service Ralf, really impressed with your customer service skills):
To: support |at| vorpx com
Subject: VorpX Regisration
Name: [First Name] [Last Name]
Email: [Email Address used to pay with]
Serial #: [Serial copied from initial screen when loading vorpx]
Just replace everything with the  brackets with the information you use and you should get a response back quickly, depending on time you do it. I think he does it himself and I doubt he’s a machine and needs rest sometimes.
I have a bizarre (and possibly stupid) question: I downloaded the installer, extracted, and there was nothing in the folder O_O …I’ve tried a few times, downloaded the installer again…still don’t see it when I extract…..Anyone know what’s up here?