C64 OS Software updates add great new features: Support for Mouse Wheel; Mount .D64, .D71, .D81 and .DNP Images in File Manager; Listen to SID Music; View new Commodore Grafix (CGFX) files including 3D-models, panoramic scenes, and short animation sequences; Customize boot options in different modes; Access the native file system through VICE in File Manager; and much more.
Source: c64os.com