Who says GoDaDa is forcing you to use Website Tonight? If they allow you to use FTP, use any web editor you want and upload it with a FTP program. Just overwrite any Website Tonight files that are already there. Just be sure you use the public_html directory.
FileZilla FTP Tutorial - How to Upload Your Site with FileZilla
In this tutorial you learn how to upload your website using FileZilla, the popular free FTP application. FileZilla is available for Windows, Mac and Linux.
Read the full article here:
http://www.elated.com/articles/filezilla-tutorial/
Homepage of FileZilla: http://filezilla-project.org/
FTP and CHMOD Tutorial: http://www.phpjunkyard.com/tutorials/ftp-chmod-tutorial.php
Web Editors (Many Free):
10 Fantastic Free Web Page Editors: http://www.elated.com/articles/10-fantastic-free-web-page-editors/
Free HTML Editors, Web Editors, and WYSIWYG Web Editors and Site Builders:
http://www.thefreecountry.com/webmaster/htmleditors.shtml#htmleditors
WYSIWYG Editor List: http://en.wikipedia.org/wiki/List_of_HTML_editors#WYSIWYG_editors
25 Useful WYSIWYG Editors Reviewed: http://www.smashingmagazine.com/2008/05/06/25-wysiwyg-editors-reviewed/
Basic text editors: http://en.wikipedia.org/wiki/List_of_HTML_editors#Basic_text_editors
Ron