Hello,
Let’s go back to your first site. Please update all required plugins – https://www.8theme.com/download-plugins/. Upload the extracted folder via FTP to wp-content/plugins directory. Also, try to update the theme as I described before.
If you need help with the update, make full backup of the site, DB and theme options, inform us and we’ll update theme for you.
About the new your site, you can try to install theme via FTP https://www.8theme.com/demo/docs/woopress/#!/installation_upgrade
Please note that may use the 1 license for the 1 dev domain and 1 live domain. But keep in mind that you can use our theme license for 1 end product only.
Regards,
Rose Tyler.