The Rigi plugin for SDL Trados Studio is required to open the Rigi Viewer.

Steps to install the Rigi plugin for SDL Trados Studio

1. Close SDL Trados Studio.

2. Download the Rigi plugin for SDL Trados Studio from the SDL app store
   
   
   
   
   
   
   
3. Double-click file RigiPlugin.sdlplugin
   
   This will start the wizard.
   
   
4. Follow all steps in the wizard.
   
   
   
   
   
   
   
   
   
   
5. Click Add-Ins > Plugins
   
   
   
   The Rigi plugin shall be listed.