In previous version of Photoshop, within the Adobe/Photoshop folder there was an executable (.exe) file for Photoshop. I do not see one in the 2021 version. I used it for a redirect for a pc program, Faststone.
Take a look at Faststone as an image organizer with limited editing capability..
I don't use Photoshop, but, if there is an icon, or shortcut to load PS, then right click on the icon and open "properties" then under "shortcut" you will see the path and exectuable name under "target". Copy and paste that into FasStone as one of your external editors.
FastStone is a great application, no doubt about that.
on my laptop that exe can be found at
C:\Program Files\Adobe\Adobe Photoshop 2021\Photoshop.exe
It's there on my windows computer just the same way: C:\Program Files\Adobe\Adobe Photoshop 2021
which windows you running
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