The program is in Reader mode and needs to be activated.
Go to Help > Activate and enter your Final Draft Customer Number (note that it cannot be a Trial number, which starts with KFDT / EFDT / XFDT / 9FDT).
Click Activate and once the activation is complete, all program functions will be enabled.
If you have FD12 and FD11 and you receive a message saying that you're out of activations, you can reset an activation here: https://www.finaldraft.com/self-service-activation/.
For further assistance with Final Draft activation, dial 818-789-6281 (carrier rates may apply). This is a 24/7 service.