I have created test product as draft and used images with good resolution. Don’t see any issue with thumbnails. I checked your products and see that you use images with 360x360px or 600x600px. That’s why you don’t have any zoom effect. If you enable default theme you’ll see the same.
Only XStore Quick View option has the compatibility problem with this plugin and unfortunately we can’t fix it. So, either you should disable Quick View option or plugin.
