Does anyone know if the RSW software has been updated recently and if so, can the FBH now be switched on?

I don't believe it will be coming, noddy. Storey needs a vehicle to do R&D on and there are no diesels in the US. But sending him a mail and asking will lead to more direct results. 
RRC 2Dr, RRC 4Dr,
P38, and 2 L322s
(wife thinks I'm nuts - prob right, too)

Yeah I tried that with another query and his response was that he had other things going on and he wasn't planning any upgrades any time soon

There are other diagnostic tools on the market that will do this

But haven't we been here before?
 
RRC 2Dr, RRC 4Dr,
P38, and 2 L322s
(wife thinks I'm nuts - prob right, too)

We have!