Ubuntu :: No Menus Anywhere On Desktop

I installed 11.04 last night and, when I found that I was having a tough time working with unity I tried to follow some of the online advice and revert to the classic desktop.

Unfortunately when I logged out, the login screen didn't have the expected menu allowing me to choose between unity and classic gnome. Then I made a big mistake. I logged in and opened the system settings menu from the drop down menu in the top right hand side of the screen (at the foot of the menu listing logout, shutdown, hibernate etc.). In there I found an option allowing me to choose my desktop environment at login. Instead of choosing Gnome, like an idiot I chose 'user defined' as my preferred environment, hoping it would allow me to choose between unity and classic at login so that i could get used to unity gently.

Now that I've restarted I'm left without any menu at all anywhere. The only way I've been able to get access to firefox is by creating a launcher on the desktop, I can't open a terminal and I'm such a ubuntu newbie that I can't think of what else to try.

All my usual files are there on the desktop, just nothing giving me access to any programmes or options.