I just tried to download terraformer and mapper and have the same problem with those as well. Trying to update and download to SC4 has been very frustrating. I'm at 1.1.638.0 but can't get to 1.1.640.0 because I can't get registered with gmax. I've tried that many times but when I press the address shown on the gmax icon downloaded to my desktop all I get is a blank page. I would like to get completely up to date but it has been one roadblock after another. I should have given up by now but I really like this program and the mods have made me even more excited to play. I sure wish it could be more user friendly!!