To do ONLINE activation please click on the "Activate online (Online Activation - Recommended)" link
Then you will get the following screen. Please enter your Name / Company name, your email address and the Serial Key received in order confirmation email.
Once you enter all the fields, please click on "Activate Now" button. Please make sure you are connected to the internet. After a while you will get the following message indicating that the product is successfully activated.
Once you get the above message, you can now start using the tool by restarting it. Remember activating one tool will automatically activate the other tool also. i.e. if you activate Forms Data Loader, the HTML Forms Data Loader will also be activated or vice versa.