Hi Henrik,
The file path is D:\Program Files\Steam\steamapps\common\Elite Dangerous.
Executable is EDLaunch.exe (confirmed launches Elite)
When browsing to the very same folder within the Infinite screen extension, the only selectable items are folders (_CommonRedist, de, es, fr, logs, Producs & ru)
The Euro Truck simulator path is almost exactly the same and now works fine (D:\Program Files\Steam\Steamapps\common\Euro Truck Simulator 2)
Stumped…!
Paul