Either way, you are under no obligation to buy, and we will not send you an unsolicited invoice.
Software demos are full-featured products, with a built-in deactivation timer. The software can be installed on as many machines as you like and will run for 30 days from the date of installation. If you decide to purchase the product, fill out and return the "Order Form and License Agreement" that's included with the shipment, and attach your check. Upon receiving payment, we will send you an authorization code that will allow the software to run permanently on the licensed machine(s).