http://developer.appcelerator.com/question/129451/refresh-a-parent-window-from-a-child

app.js

var win = Ti.UI.createWindow({
	backgroundColor: '#39f'
});

var tableView = Ti.UI.createTableView({
	data: [{ title: 'Row 1' }, { title: 'Row 2' }]
});


tableView.addEventListener('click', function(e) {
	
	var row = e.row;
	
	Ti.API.debug(row);
	Ti.API.debug(row.title);
	
	var modalWin = Ti.UI.createWindow({
		modal: true,
		backgroundColor: '#3f9',
		layout: 'vertical',
		url: '/test.js'
	});
	
	modalWin.addEventListener('updateRow', function() {
		row.backgroundColor = '#fff';
	});

	modalWin.open();
});

win.add(tableView);

win.open();

test.js

var modalWin = Ti.UI.currentWindow;

var textField = Ti.UI.createTextField({
	width: 300
});

var saveButton = Ti.UI.createButton({ title: 'Save' });

modalWin.add(textField);
modalWin.add(saveButton);

saveButton.addEventListener('click', function() {
	modalWin.fireEvent('updateRow');
	modalWin.close();
	modalWin = null;
	textField = null;
	row = null;
	saveButton = null;
});