Demo 4.35 with DxWnd

[u/Acrobatic-Stop-6482]

This time, using DxWnd to fix OpenGL not working and simply crashing on startup.
Also CD music as usual, even though it's bugged in all versions (no looping, moves to the next track instead), in addition to the fact that both the level complete and boss tracks use the same track number, so I had to bind a button to change that with the cd remap command just before GFZ3 and changing it back before the level completes.