Just recently in Windows Explorer, SW files no longer open (other file types do) - when double clicked, SW opens, but the file itself doesn't.  I have reset file associations, and made sure all error notifications are showing.  I have set "Open With" to Solidworks launcher.

Drag and drop will open the file, and using the "open" menu within SW still opens files.

Currently using SWW2015.

Has anyone seen this before and have a means of fixing ?