ATI keeps reporting a file to be backed up is corrupt

Every time I try to create an image, TI reports that a particular file (df.exe) is corrupt. df.exe is the executable for Direct Folders by CodeMaster and it runs perfectly. I renamed the file and re-installed Direct Folders (i.e, creating a new df.exe file) but TI continues to report that df.exe is corrupt.

At least, I assume it's TI reporting this, as I only ever see the systray popup when trying to create an image.