How do I convert video files to m3 format?

I recently got my 8 GB Meizu M3 and the disc that came with it. I installed the convert program, however I can't get it to work. I can open the program itself fine and add a file that I want to convert, but when I click "start" after selecting destination folder and settings nothing happens. How do I actually start the conversion, I really want to watch videos on my M3.
Can anyone help me? I'm using Windows vista by the way.