Once you're run the installer and reboot, you'll notice the ColorSwitch Pro icon in the Main Menu, to the right of the clock. Simply pull the ColorSwitch Pro menu down and select your options.
For complete instructions on how to use ColorSwitch Pro, read the ColorSwitch Pro Documentation in the Documentation folder inside the ColorSwitch Pro folder.
How do I use ColorSwitch Pro to change my monitor settings?
Simply select the resolution and scan rate you wish to change to and then select the appropriate color depth from the submenu under each resolution/scan rate. Release the mouse and your monitor will switch to the selected resolution and color depth.
The display pane is explained thoroughly in Chapter 6, "Resolution and Color Depth" of the ColorSwitch Pro Documentation.