UPDATE on my problem with the very slow UI: Seems like its only the graphical part of it that is slow, i have actually pressed the buttons before they have showed up. The cursor changes over the supposed buttons as usual even though the menu background havent changed yet. Also sliders (weather and so on) and buttons for example vehicle color change happens instantly but the visual changes in the menu doesnt happen until a few seconds later. No problem at all in World Editor btw. Tried vsync fix, blackscreen fix, clean install, no mods and so on.