If you go to window > Effects & Presets it will bring up your presets and FX or Cntl + 5.
Or if you are looking for the folder on your harddrive on a PC they can be found for Presets: C:Program FilesAdobeAdobe After Effects CS6Support FilesPresets
Effects: C:Program FilesAdobeAdobe After Effects CS6Support FilesPlug-ins
Sorry can't help you for a Mac
Johnny Cuevas, Editor
"I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work."
---THOMAS EDISON on inventing the light bulb.