Why did Nucleo create a CS3 folder in my Macintoshes Applications folder?
The default location for Nucleo Pro 2.0 to install is in the After Effects CS3 Plug-ins folder. If you have After Effects 7 instead of CS3 and did not change the installation location this folder is created. Look inside for the “GridIron Nucleo” folder and move it to the After Effects 7 Plug-ins folder.