The PlusPak depends on your original purchase.
You can go to that from the Ultra, the Mega, etc. And which you originally bought will determine what you are missing.

As Neil mentioned a call to PGMusic will get you the best value and bang for your buck.
From the product page -
Band-in-a-Box® 2018 Pro & MegaPAK users who purchase the PlusPAK upgrade will be missing RealTracks Sets up to 300. To upgrade to the 2019 version with all the RealTracks & RealDrums, purchase the UltraPAK or UltraPAK+.

Many of us suggest getting the UltraPak as early in your BiaB life as possible, as it makes every future upgrade more cost efficient and you know you have everything.


I do not work here, but the benefits are still awesome
Make your sound your own!