Hello, Josh!
You can switch the config of J4W by altering the Connection Settings under the File menu before you log in. On my Jabber client, I selected the Cisco WebEx server type and left the login server address by checking the default server option. Make sure you log into WebEx Messenger (formerly WebEx Connect) using your complete email name (in my case, dahoffma@cisco.com) and your WebEx Messenger IM password (not necessarily same as WebEx Meeting Center credentials). I don't know the startup process for J4W, so I don't know how this works with the default server option. I'll follow up, though, as I know I saw a post that addresses this.