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

This is all lower case. Can you fix that?
If your PC opens the FDR file, but it's the wrong application, you'll need to change your Windows registry file association settings. In other words, Windows is associating FDR file extensions with the wrong software program.