Mapsource was so much easier to use. The latest issue, I wanted to load new topo maps, all of the map squares were highlighted, something like 3000, of course it was to large a file to load, I had to un-highlight the squares I didn't want to use. Um no....no. Ridiculous. Went back to mapsource.
I am certain there is a way to do it, but I DNFd the info.