Windows Machines:
C:\Users\YOURUSERNAME\AppData\Roaming\Adobe\Dreamweaver CS4\en_US\Configuration\Shared\WebAssist\ApplicationBuilder\Helpers\library.php
C:\Users\YOURUSERNAME\AppData\Roaming\Adobe\Dreamweaver CS5\en_US\Configuration\Shared\WebAssist\ApplicationBuilder\Helpers\library.php