Hi, I just bought a new computer and downloaded Thunderbird. All was going well until I moved my mouse over where the shortcut button for "Write New Email Message" was (or however it was worded). Somehow, I had to have clicked on the button while moving the mouse. Now, the button is gone and I can not figure out how to restore it. Yes, I know there are other methods of getting to a new message window to transpose. But I would really like to restore the button. Thank you for your help!