Configuration

Open Add-ons → Manage add-ons → Advanced Product Options & Price Formulas → Settings. The rules themselves are set per option and per product (see Usage).

General

Setting	Default	Description
Enable	On	Switches all rules on or off for new carts without uninstalling.
Show the price breakdown on the product page	On	Lists the base price, option prices, formula amounts, one-time fees and the total for the chosen quantity under the product options. Prices are calculated the same way when this is off.
Show the breakdown in the cart	On	Shows the formula amounts of each item under its options in the cart and at checkout.
Show the breakdown in orders	On	Shows the formula amounts of each item in order details (customer and admin), invoices and order e-mails.
Update the price while customers type	On	Recalculates the price when a number or text used by a formula or condition changes (when the field loses focus), without reloading the page. When off, the price updates when another option or the quantity changes.
Taxes on one-time fees	Use the product’s tax classes	One-time fees are taxed like the product they belong to, or not taxed.
Vendors can edit price rules	Off	Multi-Vendor only. Vendors can add formulas, limits and conditions to the options of their own products, edit the Price formula tab and use the test calculator. The overview page stays for administrators.

License

The license status is shown in a License card at the top of the add-on page, above the tabs, so you see it on every tab. The License tab holds the key itself. The key is stored once for the whole installation.

The License card shows:

• the status in color: green when valid, blue for a development host or the 14-day period before a key is required (with the days left), amber when the license server could not be reached (with the days left) or a Marketplace number is still being verified, red when the add-on is switched off;
• in plain words what the status means and, when the add-on is (or will be) switched off, what stops: formula prices, one-time fees, number limits and conditional options stop for new carts and the product page shows the core option prices; placed orders keep their prices, fees and breakdowns;
• the licensed domain, every storefront with its result (covered, development host, not covered), the end of the updates and support period, the last and the next check, and the key in use (masked);
• the actions Enter license key / Change license key (opens the License tab), Check now (verifies at once and stays on the page), Manage license (your licenses on cs-cart.kaviolabs.com) and, without a valid license, Buy a license.

In Add-ons → Manage add-ons the add-on’s row shows a small license badge next to its name, for example License: Valid or License: Pending · 9 days left.

The add-on’s own admin page (Products → Option price rules) shows the license status in a bar at the top: a small green chip when the license is valid, or a banner with the status, what is switched off and the same actions as the card. The Price formula tab of a product shows a short note while the add-on is switched off.

Setting	Description
License key	Your Kavio Labs license key (KAVIO-XXXX-XXXX-XXXX-XXXX, from My licenses on cs-cart.kaviolabs.com) or your CS-Cart Marketplace license number. If you entered the Marketplace license number in Add-ons → Manage add-ons (the add-on’s license field), leave this empty: the add-on uses that number.
License status	Points to the License card and explains what the check sends.

What the license covers. A license is bound to the base domain you entered at purchase (for example yourstore.com) and covers every subdomain of it (www.yourstore.com, shop.yourstore.com, staging.yourstore.com). Local development hosts are always allowed: localhost, 127.0.0.1 and other private IP addresses, and host names ending in .localhost, .test, .local, .example or .invalid. A store on a different base domain needs its own license. If you move your store to a new domain, contact support.

When the add-on checks. When you save the key, and then once a day. The check runs only in the admin panel (on a page you open) or from cron, never while customers browse the storefront or place orders, and takes a few seconds at most. A cron job keeps the license verified even when nobody opens the admin panel:

php /path/to/store/admin.php --dispatch=kv_product_options_pricing_license.check

What is sent. The check sends this to https://cs-cart.kaviolabs.com and nothing else: the license key, the add-on ID and version, the host names of your storefronts, your CS-Cart version and edition, and a random one-time value. No customer, order or product data is sent. The server answers with a digitally signed result, so a forged answer is ignored.

Statuses.

Status (card)	Color	What happens
Valid	Green	The license is valid for this domain. Everything works.
Development host	Blue	The store runs on a local development host, which every license covers. Everything works.
Pending verification	Amber	A CS-Cart Marketplace license number was accepted, but the Marketplace has not confirmed it yet. Everything works.
Pending · N days left	Blue	No verified key yet (a new installation). Everything works for 14 days.
Grace period · N days left	Amber	The last checks failed (for example a network problem). The add-on keeps working for 14 days after the first failed check.
Not activated, Invalid key, Revoked, Domain mismatch, Not verified	Red	Formula prices, one-time fees, number limits and conditional options stop for new carts: products use the core option prices, every option is shown and the core validation applies. Placed orders keep their prices, fees and breakdowns, and editing a placed order keeps its amounts. Your rules and settings are kept. Domain mismatch shows the licensed domain next to the domain your store runs on.

When your updates and support period ends, the add-on keeps working. Only updates and support stop.

License information appears in the admin panel only, and only for administrators who may manage add-ons; vendors and customers never see it. When the add-on is switched off, other admin pages also show a notice once per session with a link to the add-on page; the add-on page and the add-on’s own pages show the card or the status bar instead.