Filters the license renewwal url. Allows to change the url to be followed to renew a license.
Parameters:
string $url
The url to the license renewal page. This must be a page where the user can buy the product to renew license.
Example usage:
<?php
add_filter( 'slswc_renewal_url', function( $url ) {
// Change url and return it.
return $url;
});