I second this request. My KM was unusable for days on end, freezing, taking 2 minutes to type a single character into a macro title, and similar things. Through email, @peternlewis and I discovered what this thread later revealed: my KMEditor was running condition and found image actions while they were onscreen in one or more editor windows.
I would very much like an easy temporary and permanent way (Preference, maybe?) to tell KM to stop doing that so that I can write, edit, and test macros without having KM hit 500-850% of CPU usage.