WindowBuilder Pro Eclipse is a tool for creation of RCP, SWT, and Swing UI's in Eclipse.
If you have previously installed WindowBuilder Pro Eclipse without using the Update Manager (e.g. using the WindowBuilder Pro Eclipse installer)
then you must first uninstall WindowBuilder Pro Eclipse before installing from this update site.
To install WindowBuilder Pro Eclipse from this update site
If you cannot drag the URL from your browser, then click the "Add Site..." button in the "Software Updates and Add-ons" dialog
then copy and paste the URL into the "Add Site" dialog and click "OK".