I have bought the plugin, and it doesn’t support the plugin that you are using for the variations gallery.
However, it mentions that:
If you use a different plugin to enable multiple variation images, you can write custom code that uses our pmxi_gallery_image hook to import the images into it.
Is there any chance to provide a solution?
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.