Eric,
Maybe you have this up and running, but could you explain a little more as to what is going on. When I downloaded I just put the site on the web server and converted to an application in IIS and everything works, except. Any widget that you have configured with the builder has the wrong path to the config.json file for the widget. The widgets show up but they just spin like they are trying to load. To resolve this you need to delete everything in front of the main "Config.json" that is in front of the widget folder so all should look like the following. Everything in front of the widgets needs to be deleted.
widgets/BasemapGallery/config_Select a basemap.json