I'm not a huge fan of White either, but then always said that about cars and currently own a white Fiesta and actually love the way it looks,
so I could be
converted...!
The RS785 with the straight hoses, not the banjo's! Nearly learnt that one the hard way when ordering my replacement! Did hear that the fitting is the only difference, they could be mixed and matched with MTB levers to road calipers for those wanting to put flat bars on a road bike... Unsure if you can still do that with the newer? I did a little bit of reading into if the Di2 8070 levers would work with my RS785 calipers and seemed to think they would (switching to Di2 I'd have to retain post mount calipers for my frame)... Still not 100% but can't think Shimano would've broken cross compatibility at this stage as they're normally good at retaining it.
Weird. Maybe make sure installing as Admin account, or maybe install under compatibility mode?
Any prerequisities listed in install instructions?