Please read the documentation.
You will find this on the plugin’s page on wordpress.org and in the readme.txt within the plugin.
So this means that I need to install one of the Optional Add-On to use your plugin? It doesn’t give me any functionality independently?
No, not at all.
The free plugin is fully functional. Tabs are added to posts & pages by inserting simple shortcodes. The shortcodes are described fully with examples in the documentation.
The add-ons were created to add additional features which most users do not need.
Even am not able to find any menu option in the dashboard, after installing this plugin you wouldn’t find any option to use this plugin in the latest version of WordPress
This plugin is designed to be lightweight and can be used without any of the optional add-ons. There is no admin/settings page for the plugin as it is fully functional without needing one.
To learn how to use the plugin’s simple shortcodes please read the documentation at https://wordpress.org/plugins/tabby-responsive-tabs/
