Yes, you have to "delete" them. Actually, you "Leave" the conversation. Unfortunately, all PMs (sent & received) imported as single conversations and need to be cleaned up.Okay, I'm admitting I'm not sure what I'm talking about. What can I do to "start a conversation" with someone if my thingie is 200% full? Do I delete all my PMs, so that I can start over with the new software? And how do I do that?