There are two SmartSDR profiles in the fldigi repository that lets you run two instances of fldigi and have one assigned to Slice A and one to Slice B. Pretty neat guys! I suspect the hand of Tim Ellison behind these new rig profiles!
I tried Fldigi on my laptop. CAT reports Com 4 is available ONLY, so I put it in the config file for Fldigi but just after I put it in and leave that screen, I check back and it says COM 1 again, what's up with that?