An address book is a collection of records also called connections with each connection representing a remote PC. Connections have properties that define specific characteristics of a remote session, such as the destination address, access password, color depth and so on. Connections can be grouped into folders.
By default, address books are backed up daily. You can also enable local address book encryption in which case you'll need to enter your password each time you open the Viewer.
Each record (also called "connection") in the Viewer's address book corresponds with a certain remote PC (Host) and has individual properties. To view and edit the properties right-click on a connection and select Properties.