How to order menu items created on register page by Site Categories plugin

I only have two categories in my Site Categories plugin at present although more will be added later.

What I want to do is order the list of categories created on my Register page by the plugin, but despite searching around for a couple of hours I can't seem to find a method for doing so.

The plugin does not appear to allow me the choice to present the dropdown menu items in the order I would prefer.

Please advise

Thanks