There are two editions of the same plugin, running the same rules engine. The Pro edition is the one that knows which products are in the cart, which is what most real price lists turn out to need: rates per product group, free shipping for some items and not others, several options at checkout, and the editor tools that make a large table workable. The WordPress.org edition prices by weight, value and destination.
What both editions do
The pricing side is common to both: unlimited rules, weight ranges, order value ranges, destinations by country and state, and the four kinds of shipping charge. Weight brackets, per-kilogram rates, free shipping over an amount, per-country prices and combinations of those work in either. Both run in shipping zones and as the global method, with no limit on either.
What Pro adds
Product-aware rules. The Products column, which selects cart items by shipping class and makes the rule's weight and value apply to those items only. This is the feature behind per-group rates, free shipping for some products, and surcharges on bulky goods.
Mods. The Mod column — Stop, Drop, Deny, and Require — which changes how matching rules combine, lets one rule override the rest, and can withdraw a shipping method for orders you cannot fulfil.
Several options per method. Adding, duplicating, and reordering rule tables, so one shipping method can offer Standard, Express, and pickup at once.
Editor conveniences. Undo and redo, copy and paste of rules and tables between methods and between sites, and the buttons that move rules and tables up and down.
Multi-currency. Value thresholds converted into the customer's currency when a currency switcher is active.
Direct email support. Free-edition questions are answered in the WordPress.org forum; Pro customers write to us directly.
If you have not installed either edition yet, Getting started sets up a first table either way.
Installing Pro
Pro is not an add-on. It is the same plugin in a different package, so it replaces the free copy rather than joining it. If both end up installed, the plugin sorts it out itself: activating one deactivates the other and shows a notice explaining what happened. Removing the copy you no longer need keeps the plugins screen tidy.
Three steps
1. Deactivate and delete the free plugin. Your settings are stored separately
and survive this untouched.
2. Download the Pro package with the link from your purchase email.
3. Upload and activate it at Plugins → Add Plugin → Upload Plugin.
Your rules reappear exactly as they were, with the Products and Mod columns now editable. There is no license key to type in: the package you download already carries your license. If you forget to remove the free copy first, nothing is harmed — WordPress will run one of them and the plugin will deactivate the other.
Two practical notes. Safari unpacks zip files on download by default, which leaves you with a folder WordPress cannot install — right-click the link and choose Download Linked File instead. And if the purchase email has not arrived, check your spam folder; if it is not there either, tell us and we will send the link again.
How the license works
A license covers one production site and gives you a year of updates and support. Test, staging, and local copies are not counted, so develop freely.
It is not a subscription. Nothing is charged automatically, and when the year ends the plugin keeps working exactly as before — only updates and support stop until you renew. We send a reminder with a renewal link shortly before the expiry date and again just after it, and renewals made in that window are discounted.
Updates arrive in the WordPress dashboard like any other plugin update. If one fails, the message says why: an expired license names the date it expired and carries a renewal link. Moving a site to a new domain needs nothing more than installing the plugin there and removing it from the old one.
The refund window is stated on the purchase page, and the full terms are on the Terms & Conditions page.