you can change the key in the registry after activation. This will enable us to play the game LAN using hamachi. If you distributed the file with a changed key, nobody can go online with it.
The key wouldn't be stored raw in the registry. That would be a little too easy, and we would've seen a crack or instructions already. The key is undoubtedly encoded somewhere/somehow, and unless you know the location and encoding scheme, you couldn't change it with a simple edit. And replacing it with random data would probably break the software, I'd assume (since again that would be too easy).

