When you log in, you should see a page that says Account Overview. Scroll down a little to see the name/URL for you site. On the right hand side, there's an edit button. Once you click and open, you should have a page that says Website Manager. You can use the website wizard or text/visual editor link for editing. If you're working with the wizard, I suppose you'd click that one. I'm not familiar with that setup...I use text/visual editor.
I hope that helps. There will be others reading this, and if I've steered you wrong, they'll get you on the right track.
thank you for your help, everything works o.k. now