Existing owners may now convert their existing license key to a steam key ahead of the Formula Truck 2013 release on Steam.
A similar system will be available soon for Game Stock Car Extreme.
And an important notice: from now on, while you will remain able to buy the games (as a bundle or individually) outside of Steam in the current method, future non-Steam purchases will NO LONGER warrant Steam keys.
Convert you existing license key here: http://www.gameformulatruck.com/en/steam.php