1. The first time you run the app, it will add some registry value to register the app with Autodesk® AutoCAD®. Choose "Always load this application", and then the app will load automatically every time AutoCAD is started.
   
   
2. When AutoCAD loads, type RI or RIEDIT to invoke major commands.
   
   
3. RI command has sub-options to choose either the object or the internal point or the polyline.

The installer that ran when you downloaded this app/plug-in from Autodesk App Store will start installing the app/plug-in. OR, simply double-click the downloaded installer to install the app/plugin. You may need to restart the Autodesk product to activate the app/plug-in. To uninstall this plug-in, exit the Autodesk product if you are currently running it, simply rerun the installer, and select the "Uninstall" button. OR, click Control Panel > Programs > Programs and Features (Windows 7/8.1/10/11) and uninstall as you would any other application from your system.