For anyone who is on the fence about doing this, don't be scared.
I simply followed the directions from where you turn the phone off, start the update program on the PC, plug in the usb cable, press both volume up and down together, while holding press power and and hold all three buttons until the screen goes off twice, release power but keep holding both volume keys until the download screen appears.
From here the update program showed com4 connected with id4 and I clicked start. It only took a few minutes and the phone is now back to stock. The program will announce when it is complete and there is a box on the screen that will say reset. This is your indication that it has completed successfully. It did do an update on first boot and once it rebooted I now have a stock phone without root.
I did not use master clear, just clicked on start.