I have a file that I update and save daily. yesterday when I went to open it I got the following message: File Format Not Valid. This pops up in middle of the screen. the only option it gives me is a button that says OK. I have tried to recover an old version of the file using the windows recovery tool but I keep this file on an external drive which it does not recover. Any help with how to get this file back would be greatly appreciated.
Paul
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