The object enabler is used to display components in the AutoCAD DWG file. I have checked all the websites, but couldn't find anything related to the plant data. If you have the Object Enabler installer, then I recommend reading its built-in Help. In case it features an installation directory, then you should access that as well.
Contact support to obtain additional details about it: http://www.coade.com/Support/Dealers.shtml