I followed the instructions, and it didn't have any effect. Same as before. Given that it was a fresh install of Windows 1709 with all of the drivers updated, and a fresh install of Start 10, I'm not surprised. Start 10 is not scaling properly after the Fall Creators Update on my computer.
Also, even though it doesn't show in the image I posted, the image in the menu is set to stretch to show entire texture, but it is tiling on the right side. So a part of the left side of the texture is wrapping around to the right side of the menu.