Export your Listbaby List
From HostBaby Wiki
To begin the process, log in at: http://yourdomain.com/hostbaby/ (replacing yourdomain.com with your actual domain)
For Wizard users, click the "ListBaby" icon in the upper navigation bar.
For Non-Wizard users, click the "Manage your Mailing List" link in the lower left-hand box.
Once inside the ListBaby interface, click on "Your List"
At the bottom of the screen, you will see a link that says "download your list." Right-Click (or CTRL-Click) the link and choose "Save File As" to choose the spot to download the file to.
Simple as that. Your list is now backed up to your local hard drive. :)