Visit the Glarysoft Software Update Pro giveaway page and enter your email to receive the free license key. Download Software Update Pro using the link provided above. After the download, install the software on your computer and launch it. Find the “Manage License” option or button. In the activation window, enter your email and the license key. To avoid errors, you may want to copy and paste the information. Once entered, click “Activate Now” to complete the activation.