Stop Growl and the menu item if it’s running. The "default" branch seems to be old and unused. If you have Growl and you want to remove it from your system, there are two ways: Growl 2.x Find Growl, it’s an app probably in your Applications folder.
Place it on a colored backdrop or add a new background to put your subject in a completely new environment. Please note: you should Download and install Growl app installation files only.