Media converter consitently fails

I have just bought the Fuze+ and have attempted  [three times] to use the media converter to transfer mp4 files from my DVR set up.  These mp4 files play successfully on Windows Media Player,  Media Player Classic, PowerDVD, Quiktime, on all the computers in our house.  The conversion for two files, 50min and 61 min, both came to the Fuse+ at 31min and 34min.

If I FF to near the end and play to see where they end, the Fuse+ turns itself off and restarts.

One more thing.  Even if this program worked right, WHY do you NEED to have the Fuze attached for it to do the conversion?  What is the point of that?  Why can’t you do a batch conversion and do the transfer tomarrow?