I bought EasyMas and it indeed does identify airbag issues with the facility to reset on the 4200.
In my case it appears to be the passenger door side airbag.
Unfortunately it does not reset, not an EasyMas issue, an error with the airbag itself (also confirmed by main dealer initially that they could also not reset).
I need to strip down the door to investigate, with some bypass resistors to determine whether the problem is the airbag, or the wiring to the airbag.
I do need to pull my finger out and get this done, as I'm reporting back to EasyMas my findings as this is a new addition to the EasyMas diagnostic software (and hardware).
Unfortunately I'm working away from home too much presently and finding it difficult to find the time.