Open a 3D view

Select the format, visualization, units, data, and compression 

Hit export and you’re done.

Sections of the Addin:

Format: You can select glTF to obtain the export in a .gltf and .bin formats or glb to obtain the export as a single binary file. 

Visualization: Here you can select options that will affect how your exported model is going to look like the materials, normals, flipping the YZ-axis (as many viewer like Three.js required this) or relocating the model to the 0,0,0. 

Units: Select the equivalence of what 1 unit will mean in glTF.

Data: Here, you can select which data will be exported along with the 3D meshes.

Compression: In this section you can choose what type of compression you can choose to improve the weight of you model.

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.