I can't help with the backup problem but for what it's worth I have been using Format Factory with no problems for file conversions.
Format Factory Home Page - Free media file format converter
From their website;
Format Factory is a multifunctional media converter.
Provides functions below:
All to
MP4/3GP/MPG/AVI/WMV/FLV/SWF.
All to
MP3/WMA/AMR/OGG/AAC/WAV.
All to
JPG/BMP/PNG/TIF/ICO/GIF/TGA.
Rip
DVD to video file , Rip Music CD to audio file.
MP4 files support iPod/iPhone/PSP/BlackBerry format.
Supports
RMVB,
Watermark,
AV Mux.