Plugin disrupts menus, posts, and pages

A site I administer utilizes your plugin. Since the most recent update, there have been issues with the plugin on the site.

This site has a simple jQuery script in the footer for the menus drop-downs…

$(window).load(function() {

		$('.menu-mainnav-container, .menu-members-container, .sub-menu').hide();

		$('#menubutton').unbind('click').on('click', function(e){
			e.stopPropagation();
			$('.menu-mainnav-container').slideToggle(400, 'swing');
			$('.menu-members-container').slideToggle(400, 'swing');
		});

		$('.menu li a').unbind('click').on('click', function(e){
			e.stopPropagation();
			$(this).next('.sub-menu').slideToggle(400, 'swing');
			$('.menu li a').not(this).next('.sub-menu').slideUp(400, 'swing');

		});

	});

…when the plugin is active, the script will not function – the menus and all sub-menus remain open and will not close. When I deactivate the plugin, the menus function properly.

As well, when the plugin is active, ALL pages and posts, except for the main landing page, produce a “404 Not Found”. When I deactivate the plugin, everything returns to normal and all pages and posts are present.

This site has been up since late 2013, with your plugin installed, and there have been no issues or problems until this most recent update.

I have deactivated the plugin, which means that all the galleries and images in posts/pages on this site, which are important to the site, cannot be viewed large.

Could you please investigate, as I, and the client, have been quite satisfied with its functioning on their site and would prefer to remain with your plugin.

Thank you.

https://wordpress.org/plugins/wp-jquery-lightbox/