Use the link below to download Graph. Graph is open source and distributed under the GNU General Public License (GPL), which means that you may use it freely and give it to whomever you like.
Older versions and the source code for Graph is available from SourceForge.
The file is a self-extracting installation program. You just execute the file and the installation will ask in which directory you want to install Graph. The installation will add a shortcut to Start->Programs->Graph, which may be used to run Graph.
If an older version of Graph is already installed, you can just install the new version over it. There is no need to uninstall the old version first, but make sure Graph is not running during the installation process.
Under the installation you can choose between different languages for the user interface. This may be changed later from inside the program.
If later you wish to remove Graph, you can use the shortcut in Start→Programs→Graph.