Or download the auto-updater. I believe it's listed with the HnH client as a separate download. He at least has a link to the updater in his main client mod post. With the updater, you don't have to worry about missing any updates.
edit: Yep, it's at the very bottom of his first post: http://dl.dropbox.com/u/18779594/HnH/HnH_Updater.7z Note it only works in Windows currently, but he does provide the source if anyone wants to port it to Mac or *nix