Hi Tim,
Ok, I think I found a solution.
If you're comfortable working in the Registry of your machine, please see
https://support.microsoft.com/en-us/...ion-in-windows
I found that this setting was incorrectly set. After I corrected the path, the File Association works as it should. (I'm still puzzled why it worked correctly the first time when I did the screen shots for my first response, but who knows in Windows World...)
Let me know if this does/n't help.
ttfn,
Sherry