Setting the default HTML export Template

Hi! The new nbconvert version 6 has a new template system. I would like to know if it is possible to change the default template from lab to classic (e.g., by adding a setting to ~/.jupyter/jupyter_nbconvert_config.json)?

When I use nbconvert from the command line, I can change the template (as described here). But when using the menu (File --> Download as --> HTML) in the jupyter browser interface, I don’t know how to change the template. Any help on how to do this is much appreciated!


For others interested in the same question: Because no answer is here so far, I opened an issue on Github.