Photoshop Elements 14 no longer letting me use it on my computer

I have been using PE 14 for many years now on my computer through a pre-purchase plan that I got in 2015. Recently, whenever I try to open photoshop, it says that I have to put my serial number back in to re-activate the product, but when I try this it gives me an error saying the product has been activated on too many computers. I have only activated it on two computers(which is the limit for the product), but it still gives me thsi error. I no longer have the laptop that I activated photoshop on for the second activation and there is no way that I can find to deactivate any of the accounts that adobe thinks I have access to. Is there a way that I can still use this program or try to remotely deactivate any computers linked to this product so I can try the serial number activation again?