Greg - I stumbled onto that solution just before you posted. You are correct. Keyboard Maestro macros are assigned to a specific app. The Finale 27 installer does indeed rename 26 to "Finale 26" wh...
I did figure out one significant issue. When I installed V26 but opted to keep V25, it changed the name of the V25 app to "Finale25" and installed V26 as "Finale" - which is what V25 was named. So ...