An intentional save and restore of selected items in a file display is possible using
A system-wide restore of the last selection has been requested but seems difficult to do, see:
and
I was hoping your Keep Focus & Selection might make possible a system-wide restore of the last selection in so far as it says "This script add-in adds the possibility to remember selected items and focus when navigating between folders and/or after a refresh." Hence, my request for the commands in a button which would recall the remembered selected items using the script.