Hi Meglio!
The only difference are the themes. If you buy the paid version you will get all 3 paid themes with a ton of setting and with almost 40 skins to variate the colors. If you check our demo, then you can see the Bold, the Clean and the Elegant theme which are the paid themes: https://www.nextendweb.com/demo/accordionmenu/
Also if you check our documentation you can see the extra parameters (under the themes group): https://www.nextendweb.com/wiki/accordion-menu-documentation/bold-theme/
Even more we solved the HTTPS problem that you reported. Next time please write me an email and I can so much faster solve it. If you have any question or problem please feel free to contact with me at [email protected]
Have a great day!
