The free version of the plugin lets you set an open price on one or more products of the shop.
In order to do it, you need to go to the configuration page of the product and activate the “Name your price” mode.
As you can see in the image, when the option is activated, the “Regular Price” and “Sale Price” field do not have any effect on the product, even if set, because the price will be chosen by users from the product page of the site.
If no value will be added, or with a value equal to zero, users will purchase the product freely.
If you want to edit the default label “Recommended Price” you can find in the shop page and in product detail page, go to “YIT Plugins -> Name Your Price” and edit it.