I did post a line from the UN website stating who the first Secretary General was, and you are correct, that rebooted is technically correct. What I did find interesting in reading about the creation of the United Nations - from the UN website - is that Hiss’s name never appears. One would have to wonder why.
Interesting point.
My info came from some on line biography's of Alger Hiss which explained his key role in the formulation of the UN.
Thank you.