I've removed the steam integration from the itch version. If you can please update to the latest version (#22) and retest.
Viewing post in Game crashes after first level
I've tested the new version both with Steam open and with Steam closed. It initially crashed when I first ran it, but I suspect that was a result of having files in %localappdata%\Pichon leftover from the previous version. Unfortunately, I sent the zipped reports folder before testing the new version, so if a new DMP file was generated it's not in the files I sent. If you would like I can email you a more up-to-date zip of the reports folder (or just any new DMP files that were generated.)
The only new issue is that most of the hud elements are now invisible.