Audio only

This App can be found on the web under many different names. MXFconvertermac,imixmxd, and so on. None of them worked for my purpose, although it was advertised for it.
Either this is a scam, just bad software or it is not clearly explained, how to use it.
I have tried to convert some MXF files into a file format, that I could use with iMovie. All I got was the audio.

Solarteur about MXF Video Converter-to MP4/MOV