No support for multiple menu

I’m trying to configure an ecommerce plug-in with Expound (http://wordpress.org/plugins/orillacart/).

I would like different menus on the shop page but Expound only supports 1 menu I think…is there any way round this? Thinking of using the Custom menu widget but ideally would like to replace the menu items in the top bar.

http://cardtherapy.co.uk/

Thanks!