You need to be on 4.1.1, or the option you're looking for won't show up in the menu. If you need to downgrade anyway, might as well downgrade to 4.1.1.
I tried this method on 4.2.2, 4.2.1, 4.1.2, and 4.1.1. I didn't get one of the options you are supposed to get near the end, which is menu option four.
I may wait for it to be added to this tool, or just pay to get it unlocked.