If your PC opens the CALENDAR19 file, but it's the wrong application, you'll need to change your Windows registry file association settings. In other words, Windows is associating CALENDAR19 file extensions with the wrong software program.

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if your pc opens the calendar19 file, but it's the wrong application, you'll need to change your windows registry file association settings. in other words, windows is associating calendar19 file extensions with the wrong software program.