1. How to open .epic file in Mobile ?

Step1: Download and install visual studio 2013 redistributable using below link - http://download.microsoft.com/download/0/5/6/056DCDA9D667-4E27-8001-8A0C6971D6B1/vcredist_x64.exe

Step2: Download Android app "Epic 3D View" for your Mobile or Tablet from playstore: https://play.google.com/store/apps/details?id=com.epicviewer

Step3: Export file with this plugin "Publish to Mobile View for Autodesk Navisworks"

Step4: Transfer .epic file exported using the plugin to your Mobile or Tablet and open it from "Epic 3D View"

Demo Video: https://www.youtube.com/watch?v=ecKmos5idJ8

2. Why Plugin is not visible in Ribbon bar in Fusion:

Ans: On Fusion 360, Click on "Change Workspace" at top left corner and select "Model". Plugin will be displayed. 

3. How to activate Plugin?

Ans: After Payment done, you will be provided a License key. Follow procedure below to get it activated,

For example, "Save as Object" plugin,