I went to Help >> Clear All Unconfirmed and then shut down Armory. Waited a few minutes and started Armory back up.
The Unconfirmed transaction is still there (grayed out).
I did it again and then looked for the mempool.dat file and couldn't find it. I think I need to find this file but I don't know where it should be located. I looked in my bitcoin directory as well as Armory. No dice

I understand what I'm trying to do now but the unconfirmed transaction still shows up. Should't this go away after I clear unconfirmed?
Is there a step I'm missing?
Ed