I've removed that.
There should basically never be a case where reinstalling Keyboard Maestro is useful. The only exception would be if the app itself got corrupted, and about the only case for that would be if you had a corrupted harddisk, and reinstalling Keyboard Maestro will not be the solution to the problem.
If you have a macro that is so badly done that you cannot do anything, then restart with the shift key held down so nothing launches, launch Keyboard Maestro with all the modifiers down so the Keyboard Maestro Engine is not launched, and disable the macro. I have added this, and a comment about disabling or removing the trigger to the wiki entry.
Reinstalling Keyboard Maestro is not a useful part of the process.