How do you write this figured bass?

I don’t see the ‘simplify’ option…
fb
???
(@dspreadbury, this is a conundrum. I’ve followed the manual instructions precisely, but cannot get the “show compound intervals as simple” switch to appear in properties - Win10, Dorico 5.1.21.2098 )

I have this:

… which gives me this:

Screenshot

Why am I short-changed?!

Make sure you’re in Write mode, and selecting nothing else?

Yes and yes (else the figured bass properties would not show)