Whenever I restart an image file (CS4_flyout.png) opens in Preview.

This file is part of an old Adobe suite and the file can be found in several of the old applications.

But my question is, where is the setting that is opening it on Startup? I've looked through all the plists in LaunchAgents and LaunchDaemon folders in both to root Library and the user Library.

Anywhere else I should look?