To download the Assemble Publisher Add-in for Revit, AutoCAD MEP, AutoCAD Architecture, or Civil 3D.
Option 1. Navigate to http://www.assemblesystems.com/downloads and select the appropriate add-in for your machine.
Option 2. From the Assemble web application, click the Get the Add-in link from the top of any Assemble window.
Option 3. When attempting to publish from a mismatched add-in, the add-in will direct you to the location of the new matching add-in.