I built the website on a development URL and moved it live to the new host/domain. All the files and database ported over as expected. I ran a database update (using Go Live URL Updates) and everything on the site is working as expected, except for the gallery plugin. It’s still referring to the old domain.
Why is it that the plugin itself doesn’t use the dynamic siteURL, or offer a way to change domain names, or allow other plugins to update it’s domain settings?