09/27/2007 – the demo version of Heroes of Might and Magic V: Tribes of the East was released.

Guys, where exactly do I enter the key? I downloaded the demo version, launched it, but it didn't ask for a key... ???

And it shouldn't have... The demo has 2 maps; you can play one right away, and if you want to play the other, it will ask for a key. ;)