Autoplant in Openplant Modeller


I have an Autoplant model dating back to a project in 2003 which I would like to try and utilize on a new project. What is the correct workflow for opening the Autoplant model in openplant modeller? (We do have the .mdb database files that sit beside the Autoplant models)

I have successfully opened the dwg model however all the pipes etc are being displayed as "square" (see attached screenshots). Is there an object enabler that I perhaps need installing?