Mark of the Ninja (Lost Save)

 

I bought the game like a day after the post here, sweet stuff.

But after a break of like 2-3 days i opened the game to play in steam and... No continue.
Only the option to start a new game.

I don't know if the game was updated or something in this time but either way i've lost my save, i'm not gonna play the game all over again.

Did this happen to anyone else?