THank you for your dedication to WP and for your hare work with this plugin.
Couple of Observations:
In your plugin's Settings
I would make two tabs
Simple and Advanced.
In Simple Tab - just an explanation how to put a short-code to the post or page start plugin working, a link to this support forum and a Donate button.
The rest should go to Advanced.
When I saw your Settings page, the only dire I was having, is to get another plugin, something not complicated in settings. However curiosity won, I found on this forum a short-code to start a plugin.
I need a page that I can include in emais - simple to remember, if needed:
And here is what I have so far...