I found the one which shows the Mavic Air.I believe it is 2.2.845 atleast that is the number to search I found to the newest download.
It was dated mid January 2018.
The funny part is that I kept searching over and over for this update and finally I found a message board which had the correct web address.
I have never had this problem searching for something.
The DJI Support web is nothing like it’s products. I finally got the link for my current one from a forum as well. To find it at the official site is impossible. The ones found were outdated. Sad, really.