Running this with a save from the previous version leads me down a couple of exceptions, ultimately ending at this: https://pastebin.com/JxwNetU8
Viewing post in Build Release: Version 0.60.006 comments
Getting this exception when loading a beginning of day autosave: https://pastebin.com/u04Dgna0
Update was done through the itch.io app, so I can't influence overwriting, etc.