Windows 7, Finale 25.4

When i try to open this file, which I created yesterday (by giving an existing file a new name), I get the following messages:

Error opening file "Cello Sonata I New Template v8.musx": -55
Cannot delete folder "C:\Users\Ed\AppData\Local\Temp\FIN939C.tmp\presets"

Per earlier threads on this subject, I've tried opening the document directly from the folder location, but no luck. It also won't open in earlier versions of the program.

I'm loathe to have to recall and recreate yesterday's developments on this document. Any suggestions appreciated.