Please capitalize where necessary: if your pc opens the mwd file, but it's the wrong application, you'll need to change your windows registry file association settings. in other words, windows is associating mwd file extensions with the wrong software program.
If your PC opens the MWD file, but it's the wrong application, you'll need to change your Windows registry file association settings. In other words, Windows is associating MWD file extensions with the wrong software program.