Hi I had a realm transfer and received blizzards error of having an apparently invalid name and have since had it switched back. I removed the profile belonging to my old name however its still showing on mouse overs when not in the profile list. I have manually reinstalled as well as reinstalling through the curse client each to no avail.
http://imgur.com/fofwfiZ

Make sure you delete Bagnon's saved variables (settings) when uninstalling the addon, before installing again.

They can be found at;
World of Warcraft -> WTF -> ACCOUNT NAME -> SavedVariables -> [BagBrother.lua, Bagnon.lua, etc...]