The problem is that, when the plugin is installed, the dropdown menus in the navigation don’t work. Try clicking “About Us” or “Services” to see what I mean.
Is the plugin attempting to load its own version of jQuery? May this be conflicting with the standard navigation functionality?
Optima Express does not load in jQuery as typically this is already loaded by the theme. I tried viewing the site but did not see which issues you were referring to.
Could you submit a support ticket to us so we can look further into the issue?