OK so it really is the old (correct) desktop-icons extension in use. That seems like the most likely explanation still.
I think comment #3 needs another attempt and more investigation because we need to know if disabling the extension fixes it. Please try:
gsettings set org.gnome.shell disabled-extensions "['desktop-icons@csoriano']"
and if it doesn't work immediately then log in again.
If that still doesn't succeed in removing the icons then please run:
cd ~/.local/share/gnome-shell rm -rf extensions
and log in again.
OK so it really is the old (correct) desktop-icons extension in use. That seems like the most likely explanation still.
I think comment #3 needs another attempt and more investigation because we need to know if disabling the extension fixes it. Please try:
gsettings set org.gnome.shell disabled-extensions "['desktop- icons@csoriano' ]"
and if it doesn't work immediately then log in again.
If that still doesn't succeed in removing the icons then please run:
cd ~/.local/ share/gnome- shell
rm -rf extensions
and log in again.