Microsoft didn’t remove the prompt, but made it configurable, so you can decide if you want to keep it or not.
Configuration can be found for example with right click --> properties on the recycle bin icon.
@PeterJones
Thanks for the tips.
None of the .exe files had the blocks.
I ran the update manually and how finally the Plugins Admin option has shown up.
I was wondering whether there was some change in nppPluginList.dll that might have been incompatible with my OS (Windows 7). But it seems everything is OK for now.