FileMaker Pro 11 was designed to run on operating systems like Windows 7 and Mac OS X Snow Leopard. If you are running this software on a modern computer, you are using outdated code that has not been patched for security vulnerabilities discovered in the last decade. Using a cracked version exacerbates this, as the crack itself often involves modifying the application's executable code, bypassing security protocols that might protect your data.
Even if you find a "working" key: