You did mention that you downloaded the software from the Education Community Site, right? If so, there is a Serial Number generated after download. Use the Serial Number and Product Key to activate the License, just click on the Activate button.
If you need assistance in activating it, you can contact our Registration and Activation team directly.
Products downloaded from the EDU Site are free. Feature-wise there's no difference between the Student Licenses and Commercial Products, it's just that Student Licenses are only good up to 3 years and contains the watermark.
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