Go to the Shading workspace or open a Shader Editor panel in Blender. Make sure you have selected the material you want to work with. To import a texture, right-click in the Shader Editor and choose ...

Once the button is pressed, look for the .sut file that you would like to convert (make sure there are no '.'s in the name as that will cause a few minor errors right now ). Once selected, a .png file ...