If you want to pay by credit card (MasterCard, Visa, Discover, or American Express), you can order new copies of WinTD or updates to existing WinTD licenses using this on-line order form.
To begin shopping, click on one of the categories in the menu on the right side of the screen, and add the desired product(s) to your shopping cart. You can order products from multiple categories.
When you are done shopping, click on View Cart/Check Out to review or modify your order. When you are ready to place your order, click on the "Check Out" button on the View Cart page.