Sorry I could not more of help, but actually, it is irrelevant how many other games you played, even from downloaded from this web site.i already answered ur question lol. i have played hundreds of gigs of games from this site, this game i cant get to launch. tried literally everything. i did notice one thing tho, winzip used a long time every time i used it, but 7zip did not. and yes several downloads..
*EDIT* and yes it was indeed several gb
I was not questioning your skill, just trying to ask some of the questions a technical support person could ask to understand the exact conditions in which you had the problems, e.g. version of the software you were using, and if you had patched a previous one or used directly the latest.
I had used a previous version in more than one computer without the problems you described, and I downloaded the latest one and used it, also without problems - I am only one user, but if it works systematically for me, it means it is not a problem that happens to everybody, and every time the software starts, and in general, the more information about the problem, the better for the one trying to solve it (the author).
Again, sorry I could not be more of help