I moved your post here to Adventure Game Hints and Help. I'll see what I can find out for you - and maybe someone here who has played the game will be able to offer some advice.
I did find this information from a review of the game:
Exploration works much the way it does in a first-person shooter, minus the shooting. You control your restorer’s viewpoint with the mouse and physically move yourself with the WASD or arrow keys, though these can be remapped as you see fit. You can jump with the spacebar and crouch with the left Ctrl key, but these are almost never used. Left-clicking will attempt to manipulate whatever is in front of you, either by picking it up or activating it. Right-clicking will zoom in slightly, giving you a better view of small print or simply things that are hard to see. You can also press the “E” key to look at whatever object you happen to be carrying.
The inventory system is one of the odd aspects of the game, as you can only carry one item at a time. Pick a second object up and it will exchange itself with the one you’re holding.
You can't carry more than one item at a time, nor can you drop items off anywhere you please. If you find something you think will be important, you can teleport at any time to the Case, a special area that's neither the real world nor the memory world, and store it there for later use.
