How do I clear old, outdated addresses from my address book?

The addresses in your address book are tied directly to Orders in ReadyShipper. The only way to remove outdated addresses is to remove the Orders they are associated with. Before doing this, we recommend that you backup all your orders by going to File -> Export Order(s) -> XML -> All. Once you have backed up all your Orders, then go ahead and remove any old/outdated Orders from ReadyShipper.