As the only computer I had with Ibycus Topo 2.1 installed was at work and I was at home I tried something different. I Googled around a bit and found this post online in a blog: Ibycus Topo - Free Garmin Compatible Mapping for Canada http://sbseven-shaun-canada-2010.blogspot.ca/2010/04/ibycus-topo-free-garmin-compatible.html
Part of the blog said this:
If you're only interested in a relatively small area of Canada (or like me, a narrow corridor across the country), an earlier version of the mapping, Ibycus Topo 2.1, is currently hosted at http://www.mediafire.com/acrosscanadatrails
in the directory "NTS Grid (all data)".
From there I found this file location online: http://www.mediafire.com/acrosscanadatrails#on2icg9uz9udo
...where there was a copy of the Ibycus Setup files in a zip. I downloaded that, unzipped it, moved the files included into the same folder as the files I noted in my first post in this thread and and ran the setup. It all installed just fine and works the way it should. I tried it on a second computer and that went fine too.
So this is another approach if you are looking for 2.1