We’re sorry to learn that you are not satisfied with the free version of the Restrict plugin. However, it is not true that updates are only available for the premium version as we’re releasing updates for both free and premium version of the plugin at the same time so you don’t have to worry about security patches as they are included with the free version of the plugin as well.
Now, if you would like to get a premium version of Restrict, please contact us back as we can offer you a nice discount for your premium license purchase.
Hope to get back from you soon.