When you start the game first time. You're playing main story at that moment. When you reach end of the rework the game says "You reach end of the rework. If you wish you can play the old storyline? But there can be a lot logical problems so When you finish the current rework. You need to wait for next update. So I don't go back and rework the part of the story that I've reworked, so the part that you're currently finishing is actually the current ending of that version.