tried loading a save from version 1.2.1 in 1.4.0 > crash. just tried it in windowed mode to see if crash could be avoided, same thing happened but I noticed this error window pop up:
title bar: "Oops"
message: "The game crashed. The crash report folder named "2017-05-11_130150" next to game executable. It would be great if you'd send it to the developer of the game!"
(on windows 10 enterprise 'creator's update' build 15063)