Go to File > New From Template and select a template you would like to use. That should reset the default template for when you go to File > New.
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 (phone, chat and email) for Final Draft 9 and older is no longer available.