Hello,
We would recommend you use our theme functionality. XStore is fully compatible with Elementor, but in case something goes wrong with their settings, you will need to contact the support of plugins to get assistance.
You can contact Elementor right now, maybe they will say that it is better to use their options, but it is your decision, and we are responsible for our theme settings only.
Regards
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.