UMW925

I have purchased a new laptop and want to transfer my PagePlus X9 (Serif) to my new laptop. I still have the emails with the downloads for my product, but wanted to make sure if I do the transfer I can use the product key I have. Also do I need to delete the product from the previous laptop before I download to the new one. I have the older version that I believe you all are not supporting, but I hope that you can assist me with this. Thank you, Ursula Walker