Revit :: 2014 LT Unable To Open File Created By Another User?

Using Revit 2014 LT.  Trying to open a file created by another user/seat of Revit 2014 LT (trial version for now).
 
Error Message reads "The file is open for editing by another user.  If you open the file, you cannot save changes until the user closes is.  In this case, your changes will overwrite the user's changes.  What do you want to do?"
 
The file is NOT open by another user though.  
 
I realize LT does not allow worksharing, but I assumed that was multiple users working on the same file at the same time.  We need to open files one at a time, but by different users.