redirection plugin

I’m trying to use the redirection plugin because I changed the permalink structure and now need to deal with all the 404 errors. Does anyone know how to set it so that all my links that no longer work, will ? I’m not technical so I’d need step by step instructions. My site is http://www.balletnews.co.uk

I’ve tried the plugin author but he prblicly admits that he spends very little time on direct support so I’m hoping that someone here will have used it for the same purpose and know what to do. How difficult can it be ???

thanks