Yes, it’s easy. Go to this page, purchase the premium version of the plugin and install it into your theme. Once activated the premium version, the free one will automatically be deactivated.
No, the premium version will remember your settings, besides unlocking the new features.
The premium version of the plugin lets you create infinite sections and activate the scrolling effect on each of these.
The infinite scrolling pre-loads the content of the next page and offers them inside the same page, right after the contents already available, so you will be able to show all of your products on the same page.
Yes, it does. To enable this, make sure you check the option called Change the URL of the page whenever new items are loaded.
Whenever you visit a product and then go back to the main page (with the scrolling feature enabled), you will be brought exactly where you had left, where you were before visiting the product.
Read more about how to activate this option here.