KingCMS X1 private themes live in local/themes/; they belong only to this site and are not included in release packages, and upgrades preserve them as-is. This article covers directory structure, enabling, and same-id conflict rules.
The KingCMS X1 MercadoLibre module brings marketplace orders, SKU mapping, shipping labels, and inventory/price pushes into a single backend, with orders counted separately by channel.
The new version adds sales channel tags to orders: Website, MercadoLibre, Manual, and Other. The admin panel can filter and report by channel, making it easy to see which channel actually brings in business.