The need for new saves was very deliberate here. I implemented a new feature, that needed variables, which just weren't here in older saves and I also made some adjustments to the game's progress. During all other updates, save game combatability was always given (except by a literal hand full of seemingly asystematical instances). And after all, that's why I supply save games, which lets you pop in right after the end of V0.7 or V0.8 with my "walkthrough"-choices.