Panel gone

[Christel Robert]

Newbie here.
My panel is gone!
I've browsed the mailing list and discovered, thanks to Michel Doucet who had the same problem, that I can make it come back by running xfce4-panel.
The problem is that it doesn't stay. Everytime I close the terminal, it goes away.
I know it has something to do with ~/.config/xfce4/xfce4-panel, but I don't know where to find it, and I'm not too good at finding files.

Thanks
Christel