Please keep in mind that this editor is not the holy grail. It was never meant to be released to the public. As a result, you may boot the editor up and realize that it doesn't match your expectations for a commercially-released RPG editor. You may suffer some retina burn. Perhaps a strange itching sensation. Constipation. So be prepared - you are about to experience a game editor, intended only for developers. - Chris Avellone
If you download the editor anyway, there is no need to download the documentation seperately, since it is already included (both PDF and MS-Word). I've put it up here mainly for the people who would like to take a look at the docs before deciding whether or not to download the editor.