I'm running xfce (Xubuntu 9.04). I crashed a session. At startup I have a choice to go back to a few earlier sessions (default - the crashed on, and two other named sessions that work fine).

How do I remove these saved sessions? I have no interest in saving them.
I'll try man xfce-session now. Should I google X session or stick with the ubuntu forums?
Thx in advance.