Hey there, some instances of save issues do pop up between builds that we are working on resolving with a Chapter Select. You should not need to move the save folder, only extract the new build as a new folder. If it still gives you an issue the quick fix right now is to turn on "Skip Unseen Text" in the preferences menu, then in game you can press your tab key or the 'skip' button when starting a new file, it will speed through stopping at each choice option for you to choose.
Stop at the end of the crop top scene and you'll be at chapter 4. Apologies for the inconvenience