Express Checkout is a feature that enables you to add designs from the Design Store to your Silhouette Library more quickly and conveniently.
If you have Design Store credit available, an Express Checkout will deduct the cost of the design from your credits and then add that design directly to your Silhouette Library without going through the traditional checkout process.
The Express Checkout feature can only be used if there are sufficient credits to cover the order. If the cost of the design exceeds your available credit, you can add additional credit by upgrading your subscription or purchasing a Credit Boost.
Of course, you can always use the conventional checkout to complete your purchase using other payment options (e.g. credit card or PayPal).