[Solved] Humble Bundle: Serial needed after update, none given

[omegazepher]

Short version:
Humble bundle bought.
Installed update,
Game asks for serial.


Dear all,

I bought the Humble bundle from wolfire.com and installed Penumbra.
After some trouble getting it to work on 64bit (howto posted) I updated the game.
Now it asks me for a serial. But as I downloaded the game frrom the Humble bundle site I don't have a serial.

How do I go about fixing this?

Kind regards,

Zepher