I haven't figured out how to make this program run from the web, but if you download the following zip file and then extract the files, it should run.
To download the zip file , right-click on the name of the file and choose the "Save Target As" option. Choose a file location (either the desktop or somewhere else you will remember how to get to) and download the file. After it has been downloaded, unzip the file and then launch thep rogram "Torttree.exe".