helipan...
NONSENSE!!!
It is perfectly possible to start an R44 with the clutch engaged.
The reason you can't start after stalling is that the clutch motor is still travelling. Once the clutch travel light extinguishes you can use the starter motor with the clutch engaged or disengaged.
I seriously hope that you are not qualified to fly the Robinson R44 (or 22) as this is covered in basic training.
If you are, then you'd better have a word with your instructor.