This is just a note to tell you that finding this plugin (Custom Posts Widget) in the WordPress library is very difficult for me. I love this plugin but always have difficulty finding it. I'm not sure how it is classified, but I search under terms that I can think of such as "content block", "custom post", "custom content" but I can never seem to find it. I have only been able to find it by either searching on the author name, or the full name of the plugin "Custom Post Widget".
Also, it is a little non-intuitive because the admin bar menu is "Content Blocks" but the name of the plugin is "Custom Post Widget" -- the two don't match at all.