Overwriting existing file
During the conversion, if the existing filename is the same as the converted filename, it will prompt a message asking for permission to overwrite the existing file. To disable this feature:
Click on Tools menu, select Options.
Uncheck the checkbox "Prompt for overwrite existing file".
Click on OK button
Yes
Overwrite the current file
Yes to All
Overwrite all existing files
Save As
Provide a new filename
Skip
Never overwrite this file
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Never overwrite all existing files