No, the script requires ascii input. If you use jpg2a it will take a JPG and turn it into an ASCII version of the jpg, at that point you can run it through this descrambler.
But to any of you reading this far, don't let being on windows be a deterrent. There are many excellent run-time distros out there to play around on. Google "run time Linux" for more.
And I wholeheartedly agree; it is quite fun (and rewarding) to learn.
But I'm confused...it de-scrambles what amounts to an ls -la? I gleaned from the op that it de-scrambled an image?