What the message seems to imply we do not support this file format essentially indicates that the application is unable to recognize or interpret the file format used by the file selected. Make sure that the file extension corresponds with the actual file format and that the file format is supported by the application. It might even be worth checking for an updated version of the application that could add support for newer file formats. It will help to open the file in another application to see if the problem lies with the file format. But if it should have been able to open but fails, then the file is likely corrupted. Notchox can be tested to recover corrupted files.