Go to Dashboard → Licences. Each licence shows the product, the number of seats and the key itself, hidden until you choose Reveal. Copy the key and paste it into the activation screen inside the product. If your licence covers several seats, use the same key on each machine — the platform records one activation per device and stops you exceeding the seats you paid for. If activation fails, check that the seat count has not already been used up. You can see and release activations from the same page.