Wordpress 3.1.3 Update Issue Needs Fixing Today!

I have recently automatically updated two Wordpress self-hosted (with 1-click install hosting from 123-reg) sites from running version 3.0 to 3.1.3 and the following issue occured in both cases: When in the visual editor in the Wordpress Admin dashboard for either creating posts or pages the standard "kitchen" for creating anything without HTML is now gone! I've attached a screenshot of what this looks like. Editing the HTML works fine but I need the kitchen area back. Besides this major kitchen inconvenience the sites and all the plugins function perfectly and all the content is there. I have not downloaded any FTP backup before upgrading through the Wordpress interface - I have used the export function in the Tools section of the admin though for both sites. So to summarise, I'm looking for someone with Wordpress Understanding who can either make the kitchen area appear in 3.1.3 or roll me back to 3.0 I need this done right away as I can't update the sites in the meanwhile! I'm here if you need any more info ;) Thanks! Ivan