well, if you want to save your preferences of your old e-mail adress, simply, get online with that old adress, then go to Plus!<Preferences down there is an option that said "Save/Load" click it, the follow the steps that are in it
Then when you saved it, go to your new e-mail, and go again to Plus!<Preferences Save/Load, and to same, follow the steps, but select Import my prefences to a data file
hope this would help