I operate with Bridge and Photoshop.
I open Photoshop by identifying the image I want to work on in Bridge and tell it to open on Photoshop.
Well ............. I am just back from a week away and now when I do that it opens Photoshop CC2018 (I of course keep up to date and have CC2020 loaded on my computer.
I am sure that one of you technically-minded folks will tell me what's happened and how I get it back to where it was (idiots guide only please).