In the event that you wish to connect to a different database, you do not need to install another copy of the Workgroups client to your machine - you can simply change the database url
Double-click the client to launch it (but don't enter your credentials just yet)
Click on the blue value listed in the 'Database' field:
....
Clear out the value in this field
Enter the url of the database you wish to point to, enter your credentials, and click 'Ok'