Found the door easier to work on if it was removed from the microwave oven. That's easy - just lift and pull off. With the door flat on a table, took it apart, per a YouTube file. A broad knife putty knife (and a gentle touch) are critical. Unscrewed the "crumbs" of the failed handle. Reused the original screws (rather than the longer screws that came with the replacement handle). Attached the new handle. Put the door back together. Clicked the door back on the microwave.