About the crashed HDD thing, you might be able to get back your engine/content files from the exported game. I know that it is possible to do that with UE4 games, if your game is made on this engine. If i recall correctly you hav e to unpack the .pak files using the unrealpack.exe from the engine folder. It isn't guaranteed to work, but if the game runs on ue4 it is worth a try.
On another note I'm stuck on the 11th notebook. There is an ending right? xD