This build includes a bugfix for a crash that happened on some systems when the Steamworks library could not be read.
Until we are able to investigate this further, it should now be possible to play the game even if the error happens (but the Steamworks functionalities would not work.) If this happens, you'll get an error message, although if you've been able to play the game so far, then the error isn't happening on your system.
In other news, Chapter 4 will come out in a few days, so stay tuned! =)