Try right clicking the entry and "remove from list" This works in Office 2010 anyway so I'm guessing it will in 2007.
If not download Ccleaner and run that but it will remove all recent document lists.
Hands-on: Samsung Galaxy S8 review
1995-2015: How technology has changed the world in 20 years
Samsung's beautifully designed Galaxy S8 makes for better VR experiences too
47 iPhone camera tips to help you take better photos
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.