Thanks AnotherElk,
I was thinking of Software update: FP3 A.13 MR10/6.A.031.7 as per Software update: FP3 A.13 MR10/6.A.031.7.
My FP3 is still on 6.A.031.5. (If I go into Settings, System it tells me there’s an update available but it hasn’t popped up a notification about it. I’ll put that down to the network.)
Anyway, now I’ve seen it’s available I’ll install it.
(I’ll get round to de-Googling when I have time to read all the stuff I need to read before I do it - and enough time to fix it should it go wrong.)