Continuing the discussion from What exactly are those "keyboardmaestro URL Scheme" actions and how do I use them?:
Running KM 8.4.2 on macOS 10.14.5 (Mojave)
@peternlewis, if KM is NOT running, a KM URL Scheme like this:
keyboardmaestro://m=EC1345E0-3243-484E-B488-F3717E074255
launches KM Editor, but does NOT go to the specified Macro for editing.