Okay, in my scenario, I usually tell the folks they can go back to ONE spot in the track of their lives, change one thing, but then they have to live it forward from there.
Maybe I'm dense, but not sure I get it. If you can go back and live your life forward from that time, you would have the opportunity to change a lot more than one thing, unless the first thing you changed was so transformative that nothing at all would be like your previous life. Or is your prior memory wiped clean?
If the latter, I'd say no. Wouldn't really want a do over without knowing what I know now.