Have you selected LauncherPro as your default home-screen? Updating BB would have defaulted you back to Launcher2. If you 'using' LauncherPro hitting the menu button will bring up the menu and 'preferences' will be in the center of the bottom row.
You are using Launcher2 not LauncherPro. The 'dock' didn't update the home-screen app reverted to Pete's default. If launcherpro is installed hitting the home button should prompt you to choose which you want to use. If not d/l HomeSwitcher from the market.