Yes, that's correct. Just download the new Assistant, install & launch, power on and plug on the NAZA. It should ask you if you want to update almost immediately. All settings are saved.
I'm still using V 1.6 Assistant and 2.01 firmware on my 550 which has been flying well. But this update seems well worth while but can I go straight from 2.01 to the latest update?
Thanks
Phil