Hello,
The settings of ObjectDock are stored in separate files in one folder/Directory.
To back up your ObjectDock 2 settings, you can simply save the settings files:
http://sd.stardock.com/Rosco/pics/od2_save_settings.png
(C:\Users\{USERNAME}\AppData\Local\Stardock\ObjectDockPlus)
To restore your settings, just put your backed up files into that folder, and you'll be good to go.