How can I convert MP4 to WMV?

I purchased a tv show video and I want to watch it in Windows Media because I can minimize and keep it on top of other windows and watch it discretely while doing other things. It's nice that way. This is the main reason I purchased Videozilla to do this conversion, only to find out I have problems doing it. I noticed the other post about converting to Mp4 video, and notice the reply that it's in development - is the conversion from MP4 also in development?