Yes, even saves from Steam to the Patreon chapters will carry over!

With the exception of a few old bugs between v0.2 -> v0.31 or v0.3 -> v0.4.

These old versions are discontinued as of the writing of this post, so it shouldn’t be an issue anymore. If you’re switching from the free demo (Chapter 3) to the latest chapter, your save files should carry over without any problem!