There is two available files for downloading the menu. One is intended for users who will edit the menu code on the Microsoft Windows platform. The other is intended for those who, like me, edit the code on the Unix platform.
Common for both versions is that they contain a copy of the license, a readme file, installation instruction and the changelog. They also have a example site directory containing upgrade instructions, installation guide and more.
To help you with using the menu there are several contributions available. You'll find different scripts & tools which can help you build the menu. There's also other helpful tools under projects, depending on what you're wanting to accomplish.
Should you wish to play around with the latest development versions here's links to archives built using those files. Please note that it may be different from the release archive and it comes with no guarantees simply because it will contain features that do not work, bugs, and it may crash your browser (or computer for that matter). Should you wish to discuss features or parts of the code visit the message board.
If you somehow need a copy of an older version of the menu here are links to those I have available: