In this version, it's possible to update from supported versions to version 4.0.0 beta 2. Keep in mind that you can not upgrade from unsupported versions.
From now on TD-CMS is licensed under the GNU General Public License
In TD-CMS 4.0.0 beta 2 you no longer have to edit db.php and start.php yourself but instead, it's done directly from the installer.
since download_helper.php was a bit pointless is has been removed.
from now on you can upload templates directly from the admin panel.