Code:
// Toggle packagizer extension
// Trigger: Toolbar button pressed
// Customize main toolbar > add new "Eventscripter Trigger" button > Rename it to "Toggle Packagizer Extension" (without quotes, case-sensitive) > Change Icon (Optional)
if (name == "Toggle Packagizer Extension") {
var interfaceName = "org.jdownloader.controlling.packagizer.PackagizerSettings";
var key = "PackagizerEnabled";
var currentState = callAPI("config", "get", interfaceName, null, key);
var message = currentState ? "Pacagizer was disabled" : "Packagzier was enabled";
callAPI("config", "set", interfaceName, null, key, !currentState);
alert(message);
}