if your pc opens the blt file, but it's the wrong application, you'll need to change your windows registry file association settings. in other words, windows is associating blt file extensions with the wrong software program.
Capitalize this past sentence correctly.
If your PC opens the BLT file, but it's the wrong application, you'll need to change your Windows registry file association settings. In other words, Windows is associating BLT file extensions with the wrong software program.