Was the problem solved by yourself?
Please provide access, right now we do not have access to any of the customers who mentioned the problem with Elementor Pro and our Core, so we can’t give you a solution, without deep checking it on your site.
If you do not know how to create FTP, contact your hosting provider, they will help you.
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.