Some suggestions:
- In the help section, give an explanation of what each type of defragmenting does, and why a user might want to use each type.
- On the Drive Map Legend, explain what the light blue dots on the drive map mean (they're not listed on the drive map legend).
- A scheduling option that runs the program every X days (i.e. right now, there's no way to run the program every 4 days if that's what one wants -- only daily or weekly, etc.)