I’m sorry to hear that you haven’t received the download information for your Tobii Eye Tracker 5. I recommend visiting the Tobii Gaming website’s download page and selecting “Tobii Eye Tracker 5” under the “Tobii Eyetracking” section. Then, click on the “Download Driver” button and install the driver to install “Tobii Experience”. Once you have installed “Tobii Experience”, you can run it to ensure that it works well with your device and calibrate it. If you continue to experience issues, you can contact Tobii’s customer support team for further assistance .