Well i just updated the game latest version but then i cant continue my playthrough should i play from the beginning again? or did i miss something

Use the cheat codes:

ASHLEY - Unlock Ashley level.
ESCAPE - Unlock Escape level.
BACKDOOR - Unlock Backdoor level.
CELESTE - Unlock Celeste level.
BOSS - Unlock Boss level.
L6ALLCGIS - Unlock all CGIs.
L6ALLANIMS - Unlock all animations.