Tips on Customizing WP Private Content Plus

How to Hide WP Private Content Plus Admin Menus

function plt_hide_wp_private_content_plus_menus() {
	//Hide "Groups".
	remove_menu_page('edit.php?post_type=wppcp_group');
	//Hide "Groups → Groups".
	remove_submenu_page('edit.php?post_type=wppcp_group', 'edit.php?post_type=wppcp_group');
	//Hide "Groups → Add New Group".
	remove_submenu_page('edit.php?post_type=wppcp_group', 'post-new.php?post_type=wppcp_group');

	//Hide "Private Content Settings".
	remove_menu_page('wppcp-settings');
	//Hide "Private Content Settings → Private Content Settings".
	remove_submenu_page('wppcp-settings', 'wppcp-settings');
	//Hide "Private Content Settings → Global Restrictions".
	remove_submenu_page('wppcp-settings', 'wppcp-global-restrictions');
	//Hide "Private Content Settings → Search Settings".
	remove_submenu_page('wppcp-settings', 'wppcp-search-settings-page');
	//Hide "Private Content Settings → Password Settings".
	remove_submenu_page('wppcp-settings', 'wppcp-password-settings-page');
	//Hide "Private Content Settings → Private User Page".
	remove_submenu_page('wppcp-settings', 'wppcp-private-user-page');
	//Hide "Private Content Settings → Admin Permissions".
	remove_submenu_page('wppcp-settings', 'wppcp-admin-permissions');
	//Hide "Private Content Settings → Security Settings".
	remove_submenu_page('wppcp-settings', 'wppcp-security-settings-page');
	//Hide "Private Content Settings → Site Lockdown".
	remove_submenu_page('wppcp-settings', 'wppcp-site-lockdown-settings-page');
	//Hide "Private Content Settings → User Profiles Made Easy".
	remove_submenu_page('wppcp-settings', 'wppcp-upme-settings');
	//Hide "Private Content Settings → Getting Started".
	remove_submenu_page('wppcp-settings', 'wppcp-help');
	//Hide "Private Content Settings → PRO Version".
	remove_submenu_page('wppcp-settings', 'wppcp-pro');
	//Hide "Private Content Settings → Addons".
	remove_submenu_page('wppcp-settings', 'wppcp-pro-addons');
	//Hide "Private Content Settings → FAQ".
	remove_submenu_page('wppcp-settings', 'https://www.wpexpertdeveloper.com/wp-private-content-plus-faq');
}

add_action('admin_menu', 'plt_hide_wp_private_content_plus_menus', 10000);

Where do I put this code?

How to Hide WP Private Content Plus Meta Boxes

function plt_hide_wp_private_content_plus_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "WP Private Content Plus - Restriction Settings" meta box.
	remove_meta_box('wppcp-post-restrictions', $screen->id, 'normal');
	//Hide the "WP Private Content Plus - File Attachments Settings" meta box.
	remove_meta_box('wppcp-post-file-attachments-general', $screen->id, 'advanced');
	//Hide the "WP Private Content Plus - Manage File Attachments" meta box.
	remove_meta_box('wppcp-post-file-attachments', $screen->id, 'advanced');
	//Hide the "WP Private Content Plus - Add New Users" meta box.
	remove_meta_box('wppcp-groups-general', $screen->id, 'normal');
	//Hide the "WP Private Content Plus - Group Members" meta box.
	remove_meta_box('wppcp-groups-users', $screen->id, 'normal');
}

add_action('add_meta_boxes', 'plt_hide_wp_private_content_plus_metaboxes', 20);