This error means you've used up the allocated activations for your Final Draft Customer Number. Each Customer Number allows two activations.
If you have access to an activated computer, you can open Final Draft on that computer and go to Help > Deactivate to deactivate it.
If for some reason you aren't able to deactivate Final Draft 12 / 11 (hard drive crash, reformat, etc.), please visit the activation reset page: https://www.finaldraft.com/self-service-activation/.
If you need further assistance (or you have FD10), please contact our tech support team during office hours HERE. Outside of business hours, you can call the after hours activation line, 818-789-6281, for a replacement activation. Note that this line is not technical support. They are available from 5:30PM PST-8:30AM PST M-F and all day Saturday and Sunday.
NOTE: Activation service for Final Draft 9 has been discontinued and this version of Final Draft is no longer activatable (or re-activatable) to run in full mode on any computer. The program will continue to work but only on a computer that is already activated and only if nothing is done to the computer that will deactivate it (such as an OS upgrade or a replacement hard drive).
Technical support for Final Draft 9 and older is no longer available.