Failed attempt at getting ableton to export a project via js automation on mac

exportAbletonFolder.js

#!/usr/bin/env osascript -l JavaScript

function run(argv) {
  var folder = argv[0];
  console.log(folder);

  var fm = $.NSFileManager.defaultManager;

  var contents = fm.contentsOfDirectoryAtPathError(folder, null);

  var alsFile = ObjC.unwrap(contents).map(function (oItem) {
    return ObjC.unwrap(oItem);
  }).filter(function (file) {
    console.log(file);
    return file.match(/\.als$/);
  })[0];

  if (!alsFile) {
    console.log('No Live project file found');
    return;
  }

  alsFile = folder + alsFile;

  console.log(alsFile);

  var app = Application.currentApplication();
  app.includeStandardAdditions = true;
  app.doShellScript('open "' + alsFile + '"');


 // ??? Can't get this stuff to work

  delay(0.5);
  var se = Application('System Events');

  // Press Cmd-Shift-R (export)
  se.keystroke('R', { using: ['shift down', 'command down']});

  // Press Enter
  se.keyCode(36);
  se.keyCode(36);
}