It looks like the company may have stopped supporting the lite version. But you can download the most recent version here: https://github.com/wp-plugins/cart66-lite/archive/master.zip
Cart66 Cloud has all the features of Cart66 Lite plus a ton more. In addition, you get a suite of connected services to handle PCI compliance and to improve the reliability of you store overall. Overall, Cart66 Cloud works a lot like Cart66 Lite in terms of the overall methodology of building your site. It just makes things a lot easier by giving you a better and more secure system to work with. For example, you don’t even need your own SSL certificate because Cart66 Cloud comes with a hosted payment page that looks exactly like your WordPress site.
If you are interested in learning more, this getting started article is a good place to start: https://cart66.com/blog/getting-started-cart66/
If there’s anything I can do to help you get started with Cart66 Cloud, just let me know.
