Rinux55: Does not work for me. Ui looks horribly blurry on my 1440p setup :(
Did you check in-game? The main menu and character creation are not affected by the scaling setting; other than loading a save, or starting a new game, if you select Story in the main menu and then Load Campaign, the load window should be scaled. The following will make the UI much smaller:
<attribute id="MapKey" value="UIScaling" type="22" />
<attribute id="Type" value="2" type="5" />
<attribute id="Value"
value="0.5" type="6" />
Have you tried different game resolutions?
Try switching to Windowed or Fake Fullscreen display mode, to see if that will make a difference.
Try right clicking the '..\Divinity Original Sin 2\DefEd\bin\EoCApp.exe' executable, select Properties, switch to the Compatibility tab and check off the 'Override high DPI scaling behavior' option (set it to Application), maybe run as administrator and disable fullscreen optimization, and set a Win 7 or 8 compatibility mode.
Try resetting your graphics driver's 3D settings to default (right click an open area of the desktop to start the nvidia Control Panel or AMD Radeon Settings), and check if there are any stretching/scaling options, anti-aliasing, etc, enabled which may be a factor.