There are two ways to accomplish this:
- You can either click on the URL, back space until it reads only www.switchboard.marketcircle.com/ and then you can type in your second switchboard ID. i.e www.switchboard.marketcircle.com/marketcircle
- Choose Safari-> Empty Cache. Then go to Safari > Preferences, click Security and then Show Cookies. Search for "switchboard" and delete the cookie.