Trouble Updating Game Help pls

[HandsomeDragon]

The Justine DLC came as part of update 1.2 so if you don't have it, your game version must've been below that. The Justine button should appear in the launcher after applying the update.

That probably is it then, that explains why I couldn't progress in a Custom Story, by any chance do you know where I could install the 1.2 update? And if I should install it in the same file that my game file is in or in the Amnesia folder?