WallChanger - Version 3.0 WallChanger is your automatic wallpaper changing utility supporting Jpeg (JPG), Bitmap (BMP) and Gif image formats. It places an icon in your system tray and you can easily click it to change your desktop wall paper. It also controls the color of your desktop icons. A new feature is the Windows shell extension: right click on any supported image in Windows Explorer and you can instantly set it as your wallpaper!