Quote:..it is assumed that in 2018 everybody knows how to handle a ZIP file..
Dangerous assumption. I agree, unless you are unpacking other types of archive, then just for ZIP Windows file manger works as well as can be expected for MS.
I even showed back here: https://www.gimp-forum.net/Thread-Ellips...82#pid9782 but who ever revisits previous posts.
I assume that installing 7-ZIP alters the default file association. If you remember the same thing happens with the G'mic zipped plugin. That unpacks to a double folder with 7-zip just to confuse Gimp.
Some time ago with friends, ran a PC users group for 'older' people. When using Windows file manager always a bit hit-and-miss. With just the basic single window and the folder tree, dragging from source to destination was Where did the file go?
Needless really. There are free 2-pane file managers available. I think there is even a GUI for 7-zip. Might have a look at what is available.