It's very ugly.
https://www.google.com/search?q=where+does+windows+live+mail+store+contacts finds that there is "Contacts" in 7, then we have WLM and where that is stored has nothing to do with Windows 7 Contacts.
Try the Contacts you find if you click the Start Orb (dumb idea to remove the name from that button?) enter contacts and you find those. Then read more to find WLM contacts.