The Wolfram Workbench contains an automatic installation mechanism
that allows you to get updates and add new features from various update
web sites.
You can access the install mechanism
in a number of ways from the Help menu, which is shown below.
Install Workbench Extras
If you select the Install Workbench Extras menu, the Wolfram Workbench will give you an offering of extra features to install.
Check for Updates
If you select the Check for Updates menu, the Wolfram Workbench will search on the web for updates to your installed features.
Install New Software
If you select the Install New Software menu, you will be able to add a wide variety of new features to your version of the Wolfram Workbench. These can come from the large number of Eclipse update web sites that are available.