Hi!
There is no option for that, simply because the vertical alignment very highly depends on the parent container element, which the plugin cannot affect in any way unfortunately. I have looked at the page, and the issue is simply that the vertical alignment is not set on the menu items, where the plugin is positioned. All you need is this custom CSS to resolve it:
.tve_w_menu li {
vertical-align: middle;
}Please note, that this is not a plugin related suggestion, so I cannot guarantee anything, but it should still work.