Shailan Dropdown Custom List Items

I’m using the Shailan plugin for a drop down, however I have 2 nav’s :

<?php shailan_dropdown_menu( array( ‘theme_location’ => ‘primary’ ) ); ?>
<?php wp_nav_menu( array( ‘theme_location’ => ‘secondary’ ) ); ?>

using functions :

register_nav_menus( array(
‘primary’ => __( ‘Primary Navigation’, ‘Total Escrow’ ),
‘secondary’ => __(‘Secondary Navigation’, ‘Total Escrow’)
) );

the second nav is fine and only has list items from the appearance => menus

but the shailan_dropdown has all list items from both primary and secondary menu’s in appearance but I only want the list items from Primary, could any body advise me on this please??