Greetings @neuberfran,
Seeing as you have a very old software version. 4.0.0 Torizon was not even an officially released version by us. The most straightforward path would be to put your system into recovery mode and then use Toradex Easy Installer to flash a new image. Is this something that would work for your setup? Or do you have further restrictions preventing this?
Best Regards,
Jeremias