2.) If you're on a Mac, double click the downloaded file and allow it to mount to your desktop. Once it has, a window should appear instructing you to drag the TuneUp application into your computer's Applications folder. If you're on a PC, simply double click the downloaded "exe" file to begin the installation process.
3.) Relaunch iTunes and TuneUp.
4.) This "trial" version will become the full "activated" version of TuneUp once you re-enter your Activation Code. After logging in, please locate the red "upgrade" button on the bottom of the TuneUp window, and enter your activation code in the space provided.