You can find it here.
Looks like there are a ton of great new features, a whole new selection of isometric icons and terrain features, an undo/redo feature, a really easy to use coastline generator (where, oh where was that when I was using Hexographer to make my Beyond the Flanaess maps???), and a lot of other neat stuff.
Hexographer is my go-to tool for wilderness mapping. I can't recommend it highly enough, and the new version looks like a great improvement on an already great product.