Can you answer my question on the forms?

[upbeat locust]

You can probably follow any ConfigFile tutorial. The usage of that class hasn't really changed

[charred hound]

Start by declaring a config variable var config = ConfigFile.new()
Then in the ready function run config.load("path_to_config") - make sure path_to_config is NOT inside the res:// directory, as that won't work once built. Use the user:// directory instead.
To set a value, use config.set_value("category_name", "name", value)
To get a value use config.get_value("category_name", "name", default_value) - default_value is what to return if nothing has been set yet.
Finally, to save it back to the file, so changes aren't lost, use config.save("path_to_config")

[runic garnet]

huh, for me the path_to_config also works in res://

[charred hound]

Using res:// for user data isn't recommended, as it doesn't properly exist once you export the project, which can mess with treating it as a directory. (Although ConfigFile might be able to work it) Not to mention it prevents saved data from being transferred, as it's bundled into the executable.