SiteBuilderPro - How to Publish and Remove a Site
A published website creates the following content on your hosting:
1. files: "index.php", ".htaccess", "web.config"
2. folder: "sitepro" containing all necessary website files
You can delete those files and folders and thus deleting a published site.pro website.
But you then need to restore your earlier "index.php" and ".htaccess" files (or recreate them).
Unfortunately they are overwritten when you publish a site with SiteBuilderPro.
Hence the need for the restoration of earlier files.