Our plugin creates an API endpoint that exists at http://yourblogdomain.com/written_api/. The API endpoints allows us to start and end content licenses whenever you accept them through the Written.com platform.
To install the plugin, you can find it in the WordPress repository here: http://wordpress.org/plugins/written/
Or follow these instructions to install via your WordPress backend: http://help.written.com/article/31-how-do-i-install-the-wordpress-plugin
And starting with Plugin version 3.0.6 we have removed ALL of the static resources from our plugin. It now simply serves as an API for us to start and end licenses, and also to pull in the content for licensed posts.