Ah the delights of legacy code from the SIBO Series 3 developers. This trick (and a few others) are so entrenched in certain Symbina codes minds, that they were slipped in to ER6, even though they were never part of the design spec. I think ctrl-esc has the same effect on early builds.
I use Restart from PSILoc: it's free and kills all progs and restarts 9210.
But only to kill some/all programs don't use the utility from PSILOc -its memory intensive! I use ISwitcher - it's 48 KB only