Temporary workaround: Scale down your display to a lower resolution. Not beautiful, but at least it is playable.On stations:
10-15 FPS with lowest graphic settings , though I changed Win 10 settings on my new NVIDIA card (newest game ready driver) / Win 10 -> Power management mode to performance mode, tried out several changing's over hours, nothing worked. In Horizons with high graphic setting everything is fine 45-60 FPS...
Still, very sad that they killed the much prettier graphics of Horizons with this update (and no, I do not want to live without being able to go on foot, so getting back to Horizons isn't happening either).
I hope they see some sense and go back to the way graphics worked previously.