Learn how to free for all users – non admin

You need to modify only one line plugin. Be careful with the update because your changes will be undone, unless the author of the plugin do by default.

Within the plugin folder, go to the folder “classes” and open the file “options.php”.

– Find the line 38 or in the code: $capability = 'manage_options'
– Modify the entire line to: $capability = 'read'

There, all users can edit the slides.

BONUS:

To create a menu item, which is above the item “Appearance”, insert it in your functions.php:

// Add menu item for slider banner
function add_drafts_admin_menu_item() {
  add_menu_page( __('Slider Banner'), __('Slider Banner'), 'read', 'themes.php?page=simple-responsive-slider', '', 'dashicons-images-alt', '59.5' );
}

add_action( 'admin_menu', 'add_drafts_admin_menu_item' );

https://wordpress.org/plugins/simple-responsive-slider/