That zipfile's a complete release, but it's out of date at this point. You really want to get it via the updater at:
http://updater.pala.de/
That will get you the latest files and let you update them as changes are released. It's Java-based, so make sure you've got Java 6 or 7 installed and download using IE or Firefox (Chrome doesn't handle Java web-start apps right). You might also have to resize the group and raid windows larger to show the click-to-cure area, and set the raid window to advanced mode to show the cures area.