Tips on Customizing EventCalendar

How to Hide Event Calendar WD Admin Menus

function plt_hide_event_calendar_wd_menus() {
	//Hide "Events".
	remove_menu_page('edit.php?post_type=ecwd_event');
	//Hide "Events → Events".
	remove_submenu_page('edit.php?post_type=ecwd_event', 'edit.php?post_type=ecwd_event');
	//Hide "Events → Add New Event".
	remove_submenu_page('edit.php?post_type=ecwd_event', 'post-new.php?post_type=ecwd_event');
	//Hide "Events → Event Categories".
	remove_submenu_page('edit.php?post_type=ecwd_event', 'edit-tags.php?taxonomy=ecwd_event_category&post_type=ecwd_event');
	//Hide "Events → Event Tags".
	remove_submenu_page('edit.php?post_type=ecwd_event', 'edit-tags.php?taxonomy=ecwd_event_tag&post_type=ecwd_event');
	//Hide "Events → Organizers".
	remove_submenu_page('edit.php?post_type=ecwd_event', 'edit.php?post_type=ecwd_organizer');
	//Hide "Events → Venues".
	remove_submenu_page('edit.php?post_type=ecwd_event', 'edit.php?post_type=ecwd_venue');
	//Hide "Events → Calendars".
	remove_submenu_page('edit.php?post_type=ecwd_event', 'edit.php?post_type=ecwd_calendar');
	//Hide "Events → Settings".
	remove_submenu_page('edit.php?post_type=ecwd_event', 'ecwd_general_settings');
	//Hide "Events → Calendar Extensions".
	remove_submenu_page('edit.php?post_type=ecwd_event', 'ecwd_addons');
	//Hide "Events → Calendar Themes".
	remove_submenu_page('edit.php?post_type=ecwd_event', 'ecwd_themes');
	//Hide "Events → Ask a question".
	remove_submenu_page('edit.php?post_type=ecwd_event', 'https://wordpress.org/support/plugin/event-calendar-wd/#new-post');
}

add_action('admin_menu', 'plt_hide_event_calendar_wd_menus', 11);

Where do I put this code?

How to Hide Event Calendar WD Meta Boxes

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

	//Hide the "Calendar Settings" meta box.
	remove_meta_box('ecwd_calendar_meta', $screen->id, 'normal');
	//Hide the "Event Details" meta box.
	remove_meta_box('ecwd_event_meta', $screen->id, 'normal');
	//Hide the "Calendars" meta box.
	remove_meta_box('ecwd_event_calendars_meta', $screen->id, 'normal');
	//Hide the "Venue" meta box.
	remove_meta_box('ecwd_event_venue_meta', $screen->id, 'normal');
	//Hide the "Organizers" meta box.
	remove_meta_box('ecwd_event_organizers_meta', $screen->id, 'normal');
	//Hide the "Calendar Theme Settings" meta box.
	remove_meta_box('ecwd_theme_meta', $screen->id, 'normal');
	//Hide the "Venue Details" meta box.
	remove_meta_box('ecwd_venue_meta', $screen->id, 'normal');
	//Hide the "Organizer Details" meta box.
	remove_meta_box('ecwd_organizer_meta', $screen->id, 'normal');
}

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