The original game came out in the early to mid-2000s, before wide and ultra wide screens, with an assumed ratio of 800x600. While a 3d scene can be adjusted with aspect ratio, a menu will stretch to fit unless the core GUI engine code is redesigned. I went through the trouble of upgrading to DX9 (because it uses a similar fixed pipeline and not a whole redesign that 10 or higher would involve), identifying and resolving major crash bugs and memory leaks, but did not intend a rewrite of the GUI elements to either put black bars on the sides, or figure some other method for reformatting GUI screens for wider screens.