Hello, @macs,
Please note that according to the ThemeForest license policy, you can use 1 license for 1 project only (dev site, production site, localhost but the same project), read more – https://themeforest.net/licenses/terms/regular If you want to use our theme for a few different projects you need to buy a few licenses.
For the license, the above policy will be the same for you and you can use any third-party way to migrate your site or content as per your requirements, any plugin as well.
Regards 8Themes Team.