This project uses sourceforge to manage file releases, get a copy of the latest release from:
Download a copy of the installer executable, and run it to install the program. On recent versions of Windows eg. since Vista, you may need to run the installer using Administrator privileges. The installer will create a shortcut to the program on your desktop and folder in the start menu containing a link to the manual and the program itself.
In order to run the program you will need a java runtime if you don't have one installed already, and if you try to run the program without a java runtime you will be directed to download one.