KB Updates are named the same as the Knowledge Base Articles covering them. First hit from Google is the KB support page. I'm not sure how you were searching for information such that you found other links.
KB3201845 was released on December 9th and introduced issues with wifi connections. It was pulled when the issues were discovered, and has been replaced with
KB3206632 made available on Tuesday (13th), which fixes the problem.
It is not related to the issues which were seen and fixed in 2015 via KB3069068 in the Technical Preview releases of the Operating System.