Run setup.exe to install the game.
The game will run on a trial period and must be activated to continue playing. Reinstall will not work.
=======================How to activate====================
You must replace vgt_diamond.exe from your installation directory with the one inside 'Activation File'
The game will show the activation message after the 3-day trial, but will be functioning as an activated copy.
Just proceed as if you entered a valid code and it will work. This will be asked each time you open the game.
Enjoy!