Assuming you have bought the game or are using Family Sharing, here is how to access the "Build 42" you wanted:
The Indie Stone offers a free demo on Steam. It is limited:
Because Build 42 is still in beta (unstable), no reputable cracker has released a stable version. Most files labeled "PZ Build 42" are actually Build 40 (from 2019) or malware disguised as a setup.exe. You will download a virus, not a video game.