 <p>Previous posts are correct in that compatibility mode appears to be based entirely on file names. There is a simple method for determining precisely which name Windows expects:</p> <p>Right-click the file, select Properties and navigate to the Details tab. There should be an entry labelled "Original filename". Simply rename the file accordingly and it should run happily.</p> <p>Screenshot:</p> <p><a href="https://i.stack.imgur.com/nm0hM.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/nm0hM.png" alt=""></a></p>