I suspect you have other issues going on. I didn't have Gill installed (too wordy for my study habits), so I downloaded following the above instructions, and it fired right up. Here is what I would do if I were you:
- search your entire c:\ drive for "gill" and see if there is an older version hiding somewhere, and delete it and redownload the new one using above instructions. If this doesn't solve the problem -
- go to the official theWord forum (http://forum.theword.net/) and ask for help there