So here's a snapshot of my new Arturia MicroBrute synthesizer:
Ain't she pretty? (I'm so glad I got the red one.)
Now, if you had the same problem I did, you were unable to register the product in your account because you do not have an "unlock code."
All you have to do is send an e-mail to Arturia's tech support. They will simply ask you to submit a photo of the underside of the instrument where the serial number is. When they receive that, they will register the product for you.
That's basically the purpose of this blog post.