This product is shareware and wants $$$ to continue to allow you to alter the preference files on your system. (Oddly enough, the author seems to have pirated someone else's icon. See other comment in this thread.) You could of course, just alter those preference files yourself (with programs such as TextEdit, HexEdit, Plist Editor Pro etc.) or you could use other FREEWARE software to change the settings. Here are some listed on VersionTracker right now.

Tweaker 1.1 FREEWARE - simple tool to change a few hidden OS X options
http://www.versiontracker.com/dyn/moreinfo/macosx/12983

MisFox 1.2.1 FREEWARE - (Missing Internet Settings for X) gui for hidden net settings
http://www.versiontracker.com/dyn/moreinfo/macosx/18530

FinderConfig FREEWARE - enable some hidden features in 10.3 Finder & Dock
http://www.versiontracker.com/dyn/moreinfo/macosx/21309

LoginWindow Manager 1.1 FREEWARE - manage hidden login window features
http://www.versiontracker.com/dyn/moreinfo/macosx/18752

xDock 2.1.2 FREEWARE - alter hidden Dock properties
http://www.versiontracker.com/dyn/moreinfo/macosx/19675

ShowAll 1.0.1 FREEWARE - tool to reveal all hidden files and folders in the Finder
http://www.versiontracker.com/dyn/moreinfo/macosx/12980

NoZoom 1.1 FREEWARE - Disables/enables Finder window zooming in Jaguar
http://www.versiontracker.com/dyn/moreinfo/macosx/16059

HideShow Hidden Files 1.0 FREEWARE - shows or hides the hidden files in Finder
http://www.versiontracker.com/dyn/moreinfo/macosx/26064

sterMachinelite 1.5 FREEWARE - Shows hidden Finder files
http://www.versiontracker.com/dyn/moreinfo/macosx/24998