Windows 11   Finale 27.3.0.137

I had lost track of an old file that I found in the Finale Files backup folder. But the file will not open. All of the backup files have the usual aqua-colored Finale icon. About half of them also have a small yellow-colored square in the lower left corner of the icon. None of these files with the yellow corner will open. The others open normally. Any solution to this?    Thanks, Charles