Hi, it's not a limitation of the free version.
Please check the value of Popup Gallery dropdown in webrotate module settings in your admin. Is it "disabled"?
Also, depending on a template you use, our product vqmod (vqmod_webrotate360_def_product.xml) may not be able to integrate into the product gallery under the main product image automatically, so it uses an HTML element with #wr360embed or some custom id or class you gave it under Placeholder field to integrate the 360 product view in either embedded or popup mode. Which you may have configured to be the main product image.