Starting from TEA 3.0, we have the magic File > Preferences window. No text-config editing anymore. Use GUI - it is not a heresy. Now I can kick off more of config variables descriptions because they have self-explaining text labels in Preferences window.
Tabbed pages and two big buttons are there. The buttons are: Close and Save and apply. The first one just closes the Preferences window, and nothing more. But Save and apply button doing an important job - it saves all options into the good old plain text config, and then initiates reload the config. If you do not press Save and apply, so no changes will stored. TEA do not saves its main config on exit. TEA saves config just when you press the Save and apply button.
And now it's a time to give you some basic information about Preferences sections.