On 14th August 2017 for US$43 I bought

Tier: Premium Digital Download
"Baron" forum badge
access to "dev forum"
premium digital download of Pathfinder: Kingmaker
special in-game items"

On 3rd May 2018 for €58.03 I bought

Tier: Early access
"King" forum badge
access to the dev forum
premium digital download of Pathfinder: Kingmaker
special in-game items
digital art book
digital soundtrack digital RPG adventure PDF by Chris Avellone
access to the Pathfinder: Kingmaker beta
credits ("silver" section)

I think I have access to the second purchase, which I am playing, but I wanted to give one of the purchases to my son as a gift.
How do I access the other purchase?

Ben.