Since version 1.2 the function Metaboxes and custom theme location have been 
deactivated.


METABOXES
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If you were using the function Metaboxes to display different menus in a 
wordpress page theme, you'll have to make some changes.

The easiest and correct way to replace this function is to create a header for 
each theme location and then call the lmmmenu () function inside.

For example

header-1.php
<?php lmmmenu(array("theme_location" => "header-1")); ?>

header-2.php
<?php lmmmenu(array("theme_location" => "header-2")); ?>

Then you'll have to find the way to switch the headers in your theme. 
We're sorry for the inconvenience, but was offering attributes that do not 
correspond to the plugin.



CUSTOM THEME LOCATIONS
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If you was using the custom theme function location options to register theme 
locations in your wordpress theme, you will have to register these locations 
the theme manually before you make any change in the plugin panel.

To do it, you have to edit the functions.php file of your theme and use 
register_nav_menu function.

For example, if you had registered three locations from the plugin panel.

header-1.php
register_nav_menu( 'lmm-location-1', __( 'Location 1') );
register_nav_menu( 'lmm-location-2', __( 'Location 2') );
register_nav_menu( 'lmm-location-3', __( 'Location 3') );