Blender supports the concept of add-ons, as a collection of Python scripts that implement additional functionality, such as loading of particular file formats or the creation of specific object types.
A couple of these add-ons have been developed to import/export data from MORSE into Blender, independently of the robotics functionality. These are meant to help in visualising data and simplifying the work with the MORSE Builder API.
The official Blender documentation on add-ons explains how to install the Python scripts, either by hand or using the User preferences GUI.
The add-ons provided by MORSE are located in the source directory (where you downloaded the rest of MORSE), under the folder addons, or are installed in ${PREFIX}/share/morse/addons.