If you are using custom preferences path in Houdini instead of the default one you see in the Envoy PLUGINS page, then download our HDAs and supporting files and extract them to the Houdini "otls" directory. The default location for this is: Windows ...
Please note that if you prevent the given assets from being uploaded in the plugin by unchecking the Upload box it will get saved in the scene and those won't be marked for upload for future submissions for the given scene. There are also other ...