Well, I answered my own question. WP ShowPosts seems to be limited to 10 ShowPost queries/shortcodes. I deleted a query and the “Add New” button is back. Unless I can increase the number of ShowPost items I’ll be asking for a refund. One of my specialties is creating association websites. Most of the associations that I work with are “staffed” by volunteers. It’s fairly easy to teach them how to create a WordPress post and select a category. This routes the post to their specialty page on the website. Many of these sites need more than 10 post queires.
This is the first post query plugin that I have tested that limits the number of queries/shortcodes. I like this plugin a lot but need more than 10 items.