Hmm... I have Windows 7 64 Bit and it works fine for me.  The conversion takes a few minutes, maybe it is just not done?  I wish I could find a better way to do this, I am still looking!

You could try using just ffmpeg, the engine that SUPER wraps around. Mencoder may work as well (I'm not sure about this because I haven't use this as much). Both of them are command line though.

If both of them don't work, you can try importing the video to blender then have it render out some bmps.

apcalc, you could mess around with direct show. That's how I did it for TruVid. My ticalc.org file has the source if you want to see how it's done. Honestly, you could even copy it as long as you give me credit somehow.

SUPER, as I've heard and from experience, seems to be a video converter bundled with spyware/viruses. (This post (2006) describes some of the concerns with it.) I don't know if it's valid today, but there's no source at all to look at, so...

I would typically suggest HandBrake, an excellent, consistent, and stable video converter... but unfortunately, it's only a video transcoder, which means it doesn't do image output. (Its core is FFMPEG, though.)

Therefore, I would point you to WinFF, another popular video converter that directly uses the FFMPEG program. (HandBrake uses FFMPEG's libraries, IIRC.) Although I haven't personally used it myself, it is popular and I know people who use it. I don't know if it will handle video -> BMP, but... one of its interesting features is the ability to customize the presets. Someone here familiar with FFMPEG can give you the preset options to fill in so that you can easily perform the conversion from the GUI. (OK, I did "use" it - as in look around inside and then decide it couldn't do what I wanted it to do )

Good luck with your endeavor!