To register:

1) Make sure your Mac is not connected to the Internet so that the game cannot access a time server
2) Set the system date to 1st August 2009
3) Enter the following registration details:

Name: KCN Demo User
Copies: 5
Code: THGC-ZCZZ-JRSF

4) Register the game and Quit
5) Reconnect to the Internet if you disconnected previously, and reset the system date