I had installed and loved AWN, and had removed my last panel using these instructions. Everything was wonderful. However, apparently I was using an AWN package for Lucid - I'm on Maverick. After a recent run of the update manager, AWN was removed, and I now have no access to anything - can't get at any of my applications or folders. The only reason I'm able to even write this message is because I had installed the unity netbook packages to play with, so I restarted and booted into a netbook edition session.
Can someone help me get my desktop edition back? Is there a keyboard shortcut I don't know about to run a terminal window? I assume if I could get into terminal, I could reverse the instructions about hiding the last panel, and once I have a panel I could add the applications menu back, and then from there try to find a version of AWN that works on Maverick.
EDIT: Javier's answer below did get me back into the GUI with a panel that I was able to add the applications menu to. However, here's what I found. When I go into the software center to install AWN, it turns out I had previously installed it using a PPA that I found on launchpad, called PPA for AWN Testing Team (that's what shows up in the software center.) When I try to install AWN directly through the software center, it tells me I need to remove several packages that apparently got left behind (libawn1-trunk, python-awn-extras-trunk, and python-awn-trunk.) When I go into the PPA in the software center, I do see those packages, but clicking Remove doesn't actually do anything. It's like they're stuck. I tried to get into Synaptic to remove the packages from there, but when I try to run it from the applications menu, I get this error:
Failed to run /usr/sbin/synaptic as user root. Unable to copy the user's Xauthorization file.
How can I get rid of those packages so I can reinstall AWN directly from the software center?