Pre-sale question Product configurator – custom fields on products

Hello,
I’m interested in buying your plugin to create a ring configurator, but I have a doubt:
I added some custom fields to product using Product Addons & Fields for WooCommerce (in order to add measure for ring that user can select and a field where the customer can write a text for the incision on the ring), I installed the free version but in frontend I only see title, price and short description, but not my custom fields.
How could I add these extra? For the measure, I could transform the products in variable products; but for the incision field, how could I do?
Another doubt, I can’t see the filters, is it because I’m testing with the free version?
Thank you very much!