Ahhhhh. That may explain why it would just "crash" with no explanation. I'll definitely include that when I update the set to Beta 4...
And don't worry, I'm not actually putting it on peoples' computers and like, "oh hey, use this instead of Windows defrag, it's better"... I just copy it, run it, and delete it, both because it's already a thousand times better than Defrag at straightening out a mangled hard drive, and to help with testing!

(Plus, it can't corrupt their files... *cough*... right?)