FileMaker 12 has not received security updates in nearly a decade.
: Enables you to create standalone database applications that users can run without needing their own copy of FileMaker Pro installed. Filemaker Pro Advanced 12 License Key
In some older versions, going to Help > About FileMaker would display part of the key. FileMaker 12 has not received security updates in
Locating your License certificate or License Key - Claris Support Filemaker Pro Advanced 12 License Key