Not Registered Yet

I was trying to replace my Advanced Civilization game and found this site (and one other). I tried registering, but it failed (with no explanation as to why).

Anyway, I downloaded the advanced civilization files and went to unzip, using my registered winzip program. It shows 2 ".exe" files in the list but when unzipped, they do not appear. I tried unzipping JUST those 2 files, winzip tells me "there are no files to extract."

I have no clue why this is and as the other site I found this game on does the exact same thing, I am wondering if it me or you.

Thanks for any help.

-Al