Change file name config.php to settings.php

How I can rename the file 'config.php' a 'settings' without Phalcon-dev-tools stop working?

You mean in your live app? Dev-tools will generate config file during project creation (either .php or .ini flavour). Do you use Web tools perhaps?

I want a config.local.php for use with Phalcon-dev-tools

I have a different configuration structure established by the Phalcon-dev-tools.