Start with the official launch scope and Chapter 6 notes, then use the version log before trusting an older progression guide.
The official launch scope includes six chapters; Chapter 6 and ending content arrived with the 1.0.19 update.
The current guide explains the launch transition and Chapter 6 scope. A chapter-by-chapter walkthrough will be expanded without copying another guide.
The 1.0.19 notes say an Early Access mid-run cannot continue into the official release and returns the player to town.
This is a version-specific migration note, not a general claim that all save data is lost. Check the current version log before troubleshooting a save.