Windows aniversary edition

Hi guy’s,
I’ve just upgraded my windows to anniversary edition so I could bring this game out of beta. This was with the hope that it would get rid of the micro stutter the game has after a few races.
While I’ve not cleared that up I’ve now also got a new issue. I was able to set the resolution to 4096x2160 and let the graphics card down scale down to my 1440 144hz monitor. Now this option has gone and the max I can select is 2560 x 1440. while it’s not an life threatening issue, it is annoying as the down scaling does a much nicer job than FSAA does.

specs.

i7 6700K O/C 4.6ghz
gtx 980Ti
16gig DDR4
windows 10 anniversary edition