I believe the default setting is right in the middle. However, if you really want to reset all of the settings, you can just delete the mouse & it's drivers via device manager and then reconnect it.
System Manufacturer/Model Number Custom OS Windows 7 Ultimate 64bit CPU Intel Core i7 920 Motherboard GA-EX58-UD3R Rev 1 F11 Bios Memory 8 Gigs DDR3 RAM @ 1600mhz per stic Graphics Card GTX 285 Sound Card Realtek HD Audio Monitor(s) Displays Dell 19inch 16:10 Screen Resolution 1440x900
PSU OCZ Modular Extreme 700W PSU Case Antec 1200 Hard Drives Western Digital x2 500gig 7200rpm in Raid 0 Internet Speed 15mbps down 2 up Other Info Coolermaster V8 Cpu Cooler