This update brings Steam Auto-Cloud saves to the game and improves the current save file structure.
Save File Conversion
If a legacy save file exists, it will be converted to the new format and location upon launching so your game progress will not be lost.
The new filepath factors in your Steam account ID so multiple Steam users can have unique save files on the same PC.
The new save file format should hopefully fix potential issues that could occur with the legacy file being invalid.
Steam Auto-Cloud
The new save file is backed up by Steam's Auto-Cloud feature so your game progress can be shared and continued across multiple PCs.
There is currently support for Linux and MacOS overrides but these are only provided as future-proofing and Windows is recommended as there could be unintended results launching the game from another OS.