If you're upgrading from version 1.0 or 1.1 of FunctionFlip, please note:
FunctionFlip is now a System Preferences pane. Before installing version 1.2, you should quit any running older version, by selecting Quit FunctionFlip from the menu bar menu. If you've configured FunctionFlip to start at login, you'll also want to disable that via the Settings menu.
Once you've installed version 1.2, you can delete the old version, if you'd like.