have two top menu's one for visitors and one for logged-in users

Hi:

First thing first. I love the zalive theme. Thanks for the great work!

I would like to show a different top navigation menu when user is not logged-in. I already created a second menu in wordpress under $my-site-folder/wp-admin/nav-menus.php.

But when I go to customize page at $mysite-folder/wp-admin/customize.php, I see this under Navigation sub header:
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Your theme supports 2 menus. Select which menu appears in each location. You can edit your menu content on the Menus screen in the Appearance section.
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Looks like zalive theme supports only one menu for top navigation and one for footer.

Love to know if there is a way for me to programmatically change the menu based on if user is logged-in or not.

I guess I could do a if-user-logged-in logic at page level but the menu’s will still show up which I am trying to avoid.

Thanks for the help in advance!