The help documentation for Ext GWT is available as an Eclipse plugin. The plugin can be installed via the Ext GWT Update Site.
You can install the Help Plugin via the Ext GWT Update Site. From the application menu, choose . Choose the radio for 'Search for new features to install' and click the Next button. Choose the New Remote Site button
Open and look for the Ext GWT entry in the table of contents.
The help content can be updated using the update site. Open . Choose the 'Search for up updates of the currently installed features'. Eclipse will check for a newer version of the plugin.