Fixed Windows 7 atlas a little bit. List of changes:
Added rounding corners
Reflection texture (aero stripes) is removed, as it deforms when the window is resized and it's better to add these reflections using AeroGlassGUI. Nevertheless, I didn't remove the shine along the edges of the window.
Partially redrawn the texture of the window buttons, as the original texture was of poor quality.
Maybe something else, but I don’t remember.
Download Link: https://drive.google.com/open?id=1luiRyy6Q6ZFhMvruCscpl88TgMxEep6y
Preview: