I was cleaning up dropbox and moved my KM folder, after which I got MANY system error beeps but no popup/alert that KM couldn’t find/was looking for the keyboardMaestroSync.kmsync file.
You can duplicate this behavior by temporarily renaming keyboardMaestroSync.kmsync’s parent folder, then trying to edit a macro.
Can we get an alert for future-me who will probably make this mistake again?