W10 Famille - 21H1 - 19043.1165 / GW 2.3.335
It appears that you can block an application while the FW is Off. This is surprising.
On the FW screen, I wanted to display the details of an application.
I mistakenly clicked on the flame (?) instead of clicking on >. This blocked the application.
I clicked again on the flame (?) and the application was unblocked.