This repair is simple if you know what needs to be done. In my particular case, only the top screw was exposed from the inside of the microwave door. In order to get to the bottom screw, I had to pry the thin, rectangular trim away from the door. A thin, hard pry blade works good for this. Once you get one corner free, the rest of it pulls off pretty easily. I removed both screws, replaced the handle with the new one and secured the new one with the old screws. The new handle does NOT come with new screws, so you will need to buy new ones if you don't have the screws from the previous handle. Overall, it was a very simple fix worth doing yourself.
I ordered a microwave cooking tray from PartSelect; userfriendly site; and within two days, my part was delievered and easily installed. Thank you PartSelect!
I removed the screw from top. I pried of the edge with the casing with the flat end of a screwdriver. I removed the bottom screw. I then put the new handle in place and screwed it in place.