XStore Studio is available when you are using Elementor, only.
If you are using WPBakery, you can’t use the Studio and you do not need to enable the Elementor. You can use page importer, here is a video – https://youtu.be/wkIKN2IyEZI
Let us know if you need any further assistance.
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.