This has nothing to do with this plugin. Visual Composer seems to have its own role permission settings. Please take a look there(second menu item under ‘Visual Composer’). I have no experience with Visual Composer, so I don’t know what each setting is for, I’m sure their documentation will help you.
I have created a ‘Test’ role and enabled Visual Composer for that role. ‘EUREKA.AIX’ is now assigned to that role.