Get iCheck checkboxes to work with PMPro Add PayPal Express

my_icheck_radio_button_fix.php

/**
 * Fix iCheck radio buttons with PMPro Add PayPal Express and other
 * tweaks that add radio buttons to checkout.
 * Add this code into a snippet or customization plugin.
 */
function my_icheck_radio_button_fix() {
?>
<script>
jQuery(window).load(function() {
	//click our radio button when icheck is clicked
	jQuery('.iCheck-helper').click(function() {
	  jQuery(this).siblings('input[type=radio]').click();
	});

	//click icheck when our link/labels are clicked
	jQuery('a.pmpro_radio').click(function() {
	  jQuery(this).prev().find('.iCheck-helper').click();
	});
});
</script>
<?php
}
add_action( 'wp_footer', 'my_icheck_radio_button_fix', 20 );