Hi John, Welcome to the Forum!
I assume that you installed the free app on your new iPhone 5. If that is the case, then open the app and go to the "Premium Goodies" icon. Here you should find the add-ons. Just click on the ones that you previously purchased. If you are using the same iTunes account, as before, just remember that they have a record of your previous purchases and you should not be charge again, as stated on each of the add-ons.