I had the same problem. But as long as you solve it in the correct order it seems to work. Make sure you've connected the loose wires (the wres on the left and bottom of the screen show how to connect them)
Fire the laser above the lens with the lens at 2 and 10 o'clock, then when you have the lens at 4 o'clock, click the button on the laser to the right of the lens, not the one above and you shouldn't have a problem.
I'm on the final puzzle at the treshold and when i turn the lens at the 4'o clock position and click on the device above it to fire the laser the game crash/exits without any warning.. it just closes like nothing happened. Anyone have any idea about what may be the culprit/solution? I'm just one or two steps away from finishing the game and i can't, this is driving me insane...