How to find where my product is registered

My fathere-in-law had been using Photoshop for many years, starting with elements 9 and upgraded on a regular basis. Unfortunately  he recently passed away and I want to move his photoshop and his catalog to a new computer. I tried to log in using his email but Adobe says that email doesn't have an account. I have his latest CD's for installation, but without finding where his product is registered  i can't install it on my computer. I created an account using his email and installed creative cloud on his pc, but it still doesn't recognize his products. Any suggestions on where I go from here would be appreciated.