I have had this problem trying to extract files downloaded from this site off and on. I get a bad file error. Today I had trouble extracting the titan backup file. I thought it might be a problem in the download using Firefox, which is my usual browser. Hate it though I do, I closed Firefox and brought up IE. Re-downloaded the titan software and it unzipped flawlessly, no errors, installed and activated perfectly, but crashed when it opened up the browser to view a message. I haven't restarted it yet, will do that in a bit and further test it out. Then I went to download today's game, using Firefox, and got the same bad file error when trying to extract. I closed Firefox, cursing it, and opened IE and downloaded the game. Got the same bad file error when trying to extract it. That helped me realize it is not Firefox causing the problem since it happened with IE as well. I tested my connection to the Internet, no problem. Downloaded the game using the mirror site, same problem when trying to extract it. It is not the software I use to extract because other downloads from other sites extract flawlessly. It only happens here. Any ideas or suggestions? I am tired of missing offers cause I can't extract the files.
Well, continuing in troubleshooting mode, I took the next step which always is: when nothing else works reboot Windows. I rebooted and the game downloaded, extracted, installed and activated flawlessly.
Should have done that before I posted. Going for more coffee now. <sigh>