Ok, couple of observations.
Both of my computers updated today.
Win 10, use for android emulators, today when starting both they needed to update, also the computer needed to update the launcher when I opened it. Only the launcher required me to select both fullscreen and resolution. I had looked yesterday to see what resolution I had set. Prior to update I had 1360x768 fullscreen. I have since changed it to 1920x1080 as that machine has a pretty powerful GPU.
Win 7, also required an update this morning, reset to 1360x768 and fullscreen.
What I did notice is this. Depending on how powerful your machine is, the download paused about halfway through, unpacking, my win7 took a lot longer during this period then the win10 machine. Win10 did not and has not updated, only the launcher. Win10 is running version 10.0.19043 build 19043 and it is 64bit.
Both nox and bluestacks took no time at all to update the launcher and neither required me to select anything concerning display.
If you are closing down the update during this pause as maybe you think it is doing nothing, that might be the problem. The display selection screen came up before the launcher actually launched, if somehow you are closing that screen without selecting, that might be your problem. I also noticed you have to make sure fullscreen(if you want it that way)remains selected when you select resolution.
As of yet my phone has not updated.
Just checked phone is still running 126.96.36.199638 as are both Nox and Bluestacks(maybe my phone updated and I didn't notice it)
Computers are running 188.8.131.52558_D
All are usable with no problems.