Ahh it WAS a sticky situation!
I did replace the keyboard keys to new ones in both configs to http://i.imgur.com/OX0kcVJ.png, didn’t help.
I then reset all, and it did remove all my keyboard shortcuts I put in place, but Shift-S was still alive and working, the refresh does not help either.
But the moment of rejoice has come after I exited and restarted the editor, now the old keyboard key assignment has finally gone.