Allowing another site admin to view Membership Premium in dashboard

We've already installed the Membership Premium plugin successfully on; I can see it fine, and one of my new admins (whom I've added to the site) can see that we've installed the plugin...but he can't actually seem to add the plugin to his dashboard view (i.e. along the leftmost column of tabs on his admin dashboard) to use its features.

Is there any way for my additional admin to get access to Membership Premium in his admin dashboard? If you could please copy him on this reply (his e-mail is scdas AT umich DOT edu), we would much appreciate it!