Preferences
The first two items in the Options menu permit controlling Preferences and forcing the system to Associate Supported File Types. Screen-captures of the appropriate windows are shown below.
Preferences allow you to define the behavior of Media Wizard to suit your needs. The options that are controlled form that window are shown in the screen-capture above.
Associating media files with Associate Supported File Types enables Media Wizard to play and handle the selected media file formats when launched throughout your system, such as double-click in Explorer, open from external application, command line run, etc.