I have noticed that the new update "cleans up after itself", deleting folders called 20.3.1.22 in the "Engine" & "Engine64" folders under the Program Files(x86)\NIS folder on my desktop PC, leaving new folders 20.4.0.40 in their place.
However, on 2 laptops I still have a 20.3.1.22 folder in the "Engine" folder alongside the 20.4.0.40 folder. Is this an oversight, or are these folders/files needed?