If you backed up your theme then the docks you created before would be found under MyDocuments > Stardock > Object Dock Library > Backed up Themes on Vista.

On XP it would be: C:\Program Files\Stardock\ObjectDock\Themes

There is no automatic save so if you did not back up the theme then I'm afraid you will have to rebuild them. If this is the case you can back up a theme under settings > Themes.

What I don't understand is how an audio driver could have cleared your cache folder and removed your running settings. Do you know if the installer cleared a good deal of data to install the drivers somehow?