KDE defaults restoration

How do I restore all KDE 4 defaults , especially “look & feel” defaults?

system settings > work thru select defaults on all sections

or
more dramatic. Do a console login
http://dl.dropbox.com/u/10573557/Session%20Login/console.login.png

Then do:

mv .kde4 .kde4-backup
startx

All your old settings and configs etc are in the folder .kde4-backup

Ok thanks; I was even more dramatic, I erased .kde and .kde4 with no backup! I like to live dangerously! The reason why I asked all this was I could not remember if the button which is analogous to the MS Start button was by default a little arrow. I guess it is?

Thanks.

A little arrow?

Not on any system I have ever used.