Thanks for letting me know, Hrothgar!
I think something odd
happened when I updated it to 3.1.1 on Google Drive, which is where it's hosted.
However, it is also posted now to SpaceEmpires.net:
Try downloading it (3.1.1) from here.
And, I think the Google Docs thing seems to work, although it calls it 3.1.0 yet contains 3.1.1. I was able to download it as a zip file which I can open in Windows 7, by using the "File" menu on the Google Drive page that comes up, in the upper-left.