Step 1. click on your "user name" on the top tool bar
Step 2. scroll down and click on "settings"
Step 3. near the the bottom of the settings page click "disconnect" from either facebook, twitter or linkedin
Step 4. Now using another browser window, login to the facebook account you would like to use
Step 5. No return your settings page on Godinterest and click on "Add facebook"and follow the instruction.