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If all you want to do is export the geometry of the DOE prototype building as a gbXML file, and then import that gbXML file into DesignBuilder, then you don't need to update the IDF version. I say that because the location of surfaces hasn't changed between versions (the DOE reference buildings are based on EnergyPlus v8.0). So, you can:

• Import the v8.0 IDF into the OpenStudio extension for SketchUp, then export the gbXML
• Use the openstudio standards library that @Julien Marrec mentioned to generate the DOE prototype directly in the OpenStudio application, then export the gbXML