I’m sorry you’re having trouble using the plugin. You are the only person so far to complain that it “does nothing”.
If you were looking for support all you needed to do was post a question in the support forum. I respond to questions promptly.
If you were looking for documentation then you need only go to the project homepage, which has far too much detail to include on the wordpress.org plugin page. That’s why I made it the very first link in the plugin description, and also linked off the FAQ under the question “How do I use this plugin?” For your convenience however here is the link: http://squelchdesign.com/wordpress-plugin-squelch-tabs-accordions-shortcodes/