Hi. Official news from ZGameEditor's creator is that it has fully switched to 64bits. I've seen a post with a 32bits release somewhere in their forum, but I can't seem to find it now. I'll see what I can do.
Edit: Thinking about it, it should be x86_64, as the previous version was i386. I can send you a little exe made with ZGE to see if it runs on your computer, if you want.