The premium version of the plugin lets you select the role of the users for which you want to recover the abandoned cart. To do this, click on the “Settings” tab of the option panel of the plugin, and change the settings in the “User Settings” section.
The plugin aims to recover the abandoned carts of all the registered users of the store. If you want to limit this feature to a certain kind of users, select one or more WordPress roles with the “Enable for these roles” option.
Moreover, activating the “Enable Guest” option, you will be able to recover the abandoned carts of all unregistered users. In order to do that, they must add their email in the related checkout field before closing the page.