Clarissa | making Enigma Heartv0.1.68.01 is, unfortunately, going to again break save files, despite my promise that it wouldn't. It's my own fault; instead of just addressing the immediate issues, I went ahead and started developing chapter 2 content.
Good news is, I've reorganized the save file format to guard against this specific type of breaking change in future, so that's one less pain point going forward.
Martijn Frazer