Hi,
I can't tell if the option has been removed or not, but I can share the method I use to do such simulations. In fact, I found it from another user on this forum (I truly can't remember who though).
You need to type your command line in Notepad, which will look somewhat like this : telemac2d cas.txt . Then, change the extension from .txt to .bat and it will become an executable file. By double-clicking on the .bat, your simulation should start. To create a delayed start, under WinXP, under the configuration panel, you can you can program a "Planned tasks" I think, (Tâches planifiées in french), and you should be good to go.
Regards,
Martin