Write the following list of characters into a correctly formed sentence: IfyourPCopenstheM3file,butit'sthewrongapplication,you'llneedtochangeyourWindowsregistryfileassociationsettings.Inotherwords,WindowsisassociatingM3fileextensionswiththewrongsoftwareprogram.
If your PC opens the M3 file, but it's the wrong application, you'll need to change your Windows registry file association settings. In other words, Windows is associating M3 file extensions with the wrong software program.