Once you get the download, how did you put it in the mod folder? If you try to overwrite the previous version, you could run up against a problem similar to what you're saying is taking place there. Make sure you just delete the old caveman2cosmos file and THEN install the new one into the Firaxis Games/Sid Meyers Civilization 4/Beyond the Sword/Mods file located in your program files (x64 if on Windows 7 or higher). It just sounds like you may have inadvertently created a clash between the file sets from the first version and the update. It would be possible to simply remove the ok button. There's a parameter option for that when the popup is setup in the dll. Strange that its causing that problem though. I tested that scenario and all it did for me was bring the popup back since it had no selection. huh... I tested that before an additional tweak gave us the help pop on hovering over the selections though so maybe somehow that makes a difference there. Anyhow, I told myself I'd take the OK button out if there was a problem with it in anyway and apparently there can be so... its gone!