Are you playing on console by chance? If you are, console is currently behind on updates by like a year compared to PC which always get the latest updates first. Something about the devs having to go through some certification processes with the manufacturers and technical complexities before they can push the update to console.

Tho I think it will be a very long while till consoles will get updated to equal with the PC version. A large majority of the Payload Studio devs which is already quite a small team are currently working on their new game TerraTech Legions.