Next you'll face the End-User License Agreement (EULA). It's long. No one ever reads these things. (Okay, I admit, I did.) It's basically an agreement that you've purchased a license for the software, which grants you the right to use it for the outlined purposes. You agree not to alter or redistribute it in any way that violates the EULA, agree not to do anything illegal involving the software; click the "I accept the terms in the License Agreement" checkbox and with a press of Next, you're on your way.