Hi does anyone know where I can get the download installer for Tropico 3&4.

I bought both these games from Game.co.uk, and have since changed machines. I downloaded it once originally, and it now tells me the 'key' is missing to re-download it.

It's very frustrating as I have the game keys but no copy to install, and Kalypso Media Launcher does not offer the full game, only DLC so I can't enter my serial number there.

Any help would be great thanks.