DouglasKim, i played your game before the new update, and i saw in the development log "persistent date system". Do i need to play again on the new update to save my data's or not ? Thanks in advance for your answer ^^
Yes, if you played before the update you will need to play it again.
Thankfully, you can reload a previous save game and finish it up from there. All you need to do is get to the credits scene, then it'll save your progress in the persistent data system. Although I would recommend playing from the beginning. :)