You don't need the Nook App to read Nook books and magazines on your HD+. Unless I am totally misunderstanding what you are trying to do.
All you should have to do is register your HD+ with the same account you purchased the Nook books and apps with and they should automatically show up in your library on the HD+. You will have to download all of them to the HD+ but that is a matter of touching each icon and triggering the download.
Good luck. Beth
Ahh, that's what it is, thanks, I had assumed the library was just for stuff already on the tablet, not stuff in the store not downloaded yet. Thanks for the help!