So the K40 no longer connected or used and you have a new machine? Your new laser needs the software that came with it. IF this is the case un-install the old software first and re-boot plug in the new machine or follow the instructions that came with it.
BTW there are perhaps 6 or 8 laser makers in China. Maybe 4 or 5 are good the rest make junk and its usually sold on eBay by venders selling baby toys or flashlights.... they do not have a clue on how those machines work. So when you ask a question you get nonsense for an answer. When you threaten to do a Return they will stall and delay as long as they can until the 90 day return or PayPal refund times out. You can not tell by the color or outside of the machine who makes it. The only help you can get is find out the brand and model of controller in your machine and do some research until you find the user and install manuals.