CamDtudio: How can I receive the "Unlock Code", to avoid the program to disappear after 14 days?

I downloaded CamStudio , and I did not received the promised "Unlock code" therefore the program stopped working after 14 days.
Now I downloaded it the 2nd time, before three days. Still, no code arrived.
What have I to do in order to receive the code? Is it necessary only with more updated Camstudio's versions?

Thanks, Hanna 7/02/10

"Now I downloaded it the 2nd time, before three days. Still, no code arrived." You do realize that just downloading the program doesn't get you the code, but you actually have to pay for it, right?