If you still have your fla file, you may try this but its not a sure shot method -
Rename your file extension from fla to zip. Now unzip it using Winrar or something. Go inside the unzipped folder and open the xfl file in Flash Pro.
If you still have your fla file, you may try this but its not a sure shot method -
Rename your file extension from fla to zip. Now unzip it using Winrar or something. Go inside the unzipped folder and open the xfl file in Flash Pro.