I'm running 2.1.25 (I've had to go back to it several times because of scaling issues,etc...). Anyway I read that .45 is the latest release only my "check for updates" in Keyshot says there are no updates, and 2.2.42 is the newest release in the forum under "Latest version of KeyShot".
Is 2.2.45 available?
Yes it is. Just swap the 42 with 45.
Check for Updates is working now.