Hi, thank you for your question and I apologize for the confusion.
The plugin is not shutting down. It is simply under review due to a security concern. We have patched the plugin and there is no concern anymore but the WordPress plugin is doing a review to make sure. Until then, the plugin is temporarily closed. I guarantee you that the plugin is super safe, especially if you update to version 3.18.4.
I appreciate the WordPress team as well as PatchStack being so rigorous and thorough to make sure all plugins are held to high standards of security. Security is very important to us as well.
All the best, Shabti