Your Address Books are located in the Navigator of your Keep&Share account under the “Addresses” tab. In order to see the list of applications in your account, you'll first need to click on the "Home" tab. Once you've done that simply click on the “Addresses” tab to see all of the addresses and Address Books in your account.
If the “Addresses” tab is not showing up in the Navigator, you will need to add it using the “Manage Applications” icon at the bottom of the "Home" tab in the Navigator. Follow these steps:
Using the same method, you can also hide the “Addresses” application from the Navigator by unchecking all of the boxes to the left of the “Address Books” in the above pop-up dialog.