Hi Jane,
Thanks for including the file, and we'll take a look at it.
Do you perchance recall what kind of editing you were doing to the file? I realize that if you have x number of previous autosave copies that won't open, the chances are small that you can recall the type of edit that demonstrates the bug, but I figure it never hurts to ask
If you don't mind, can you please send along the backup files as well to
support@notation.com
Thanks!
Sherry