At the top of the Clippboard menu on the left side of Clipparoo, you'll see tabs for Clippboards and Brandboards. Click Brandboards. This will take you to a directory of all your Brandboards, as well as all the Brandboards you have been invited to collaborate on. Click any Brandboard name to access the page. 

Watch a video about the Brandboard directory.

Please note: This video refers to Brandboards as "Client Pages" - this is an old name for the feature.