If you are playing version 2.0 or higher, you are using the most polished version of the engine.
"Enhanced plus edition" of Kingmaker? : r/Pathfinder_Kingmaker Pathfinder: Kingmaker – Imperial Edition [v 2.0...
Adds the Tiefling race, the Kineticist class, and a new companion, Kaessi. If you are playing version 2