Adobe Photoshop Elements - Missing Icon
Here the icon in 128 x 128 in PNG format:
I uploaded the app-icon in PNG format.
Unfortunately PNG has no transparent colour, so I extracted the icon from the EXE with an icon editor.
In the icon file there are multiple sizes stored (so the icon scales).
Here is the new app-icon in ICO format:
The app-icon is now shown.
Issue is solved.