Open your scene and run the script.

Enter a title at the top of the exporter panel and mark the model as Private, Draft, and/or Animation as necessary.

In the Light, bake, uvw panel, you can enable light baking and choose Auto unwrap objects if you haven't unwrapped the model yourself.

You can adjust Texture sizes with the Density parameter. If you select your objects and click Calculate sizes, you can see how many and what size textures your model will use. The maximum texture size is 2048×2048, so if you need more, it will create multiple 2048 textures.

Under Lighting type you can choose between Automatic (a generic soft light) and Manual (lighting in the scene). It supports Scanline, V-Ray, and Mental Ray. In all cases, it will use other render settings from the scene, such as sampling.

Fill in the Tags and Description.

Authorize the script to use your Sketchfab account.

Select your model, save it, and click Publish!

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.