How do I delete the whole message archive on the Mac Yahoo Messenger?

How to delete users from message archive window (I use mac version of IM)?

• From message archive window, I could delete the conversations I had with the different users, but I can't delete the unwanted users. I am using the newest Mac version of yahoo messenger. I tried uninstall the program, but after reinstall, the users are still in the archive.

• Answer:

  I don't know Mac, but because no one wants to help you, I'm going to tell you how it works on Windows and maybe this will help you out. Click on the person's name in your Messenger list, when their info shows up, scroll to, View/Edit Contact Details and click. Look in the left-hand, bottom corner and click delete, you're going to be asked if you're sure you want to delete this person, give your reply and you're all done.