Steps to use Cadsum OBJ Exporter for Inventor:

1. Open your Inventor model in an appropriate Inventor version.
2. Click on the "Export OBJ" button in the ribbon bar under Cadsum Plugins and you will get a dialog with settings options.
3. Now click on the Export button and you will be directed to the save dialog to select the save file location.
4. Your exported model will be saved in the selected file location. View your exported model in the appropriate viewer.  

Steps to Activate: 

1. Click on the "Activate License" button in the ribbon bar under Cadsum Plugin. 
2. Enter the license key and press the Activate button. For license activation, the internet is required.

The installer that ran when you downloaded this app/plugin from the Autodesk App Store will start installing the app/plugin. Or, simply double-click the downloaded installer to install the app/plugin. You may need to restart the Autodesk product to activate the app/plugin. To uninstall this plugin, 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 7/10/11) and uninstall as you would any other application from your system.