-Save the game, then remove an item from your inventory and hold it with the pointer. To hold an item with the pointer, LEFT CLICK it but do not drag it. While the item is held with the pointer, press ESC and select "Restore". Choose to restore the saved game that was just created. You will be prompted to drop the item on the ground. Answer "No". You can now display the inventory screen and place the item back there. You will now have two of that item in your inventory.