AlphaImageLoader image href causing SSL error

I am having an issue with my padlock displaying because of the reference to a non secure image in the code of the page. I am not sure how it got there, it seems quite old and I don’t know why it is referencing a background.jpg image in the footer? It has something to do with an old IE setting?
I am not sure if it relates to enfold or an old plugin?

I am using the latest version of enfold and wordpress.

   <!-- ####### END SOCKET CONTAINER ####### -->
				</footer>

					<!-- end main -->
		</div>
		
		<!-- end wrap_all --></div>			<!--[if lte IE 8]>
			<style type="text/css">
			.bg_container {
			-ms-filter:"progid:DXImageTransform.Microsoft.AlphaImageLoader(src='http://www.gaysitgespride.com/wp-content/uploads/2014/12/background.jpg', sizingMethod='scale')";
			filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='http://www.gaysitgespride.com/wp-content/uploads/2014/12/background.jpg', sizingMethod='scale');
			}
			</style>
			<![endif]-->
		<div class='bg_container' style='background-image:url(https://www.gaysitgespride.com/wp-content/uploads/2014/12/background.jpg);'></div>