You can go to the webpart maintainance page by adding ?contents=1 to the page and delete the webpart and add it again to page
By default, there is also a redirect page layout type that gets created when publishing is enabled. You may want to take a look at that as well.
I agree to Thomson's answer, but give a try in SharePoint Designer too
Either Sharepoint designer or if you're using publishing pages, you can just go to the Pages library and edit the content there.