It is always recommended to make a full system backup!
Follow these steps:
Download Firebird from the website.
[www.datatex.co.za -> downloads -> miscellaneous section]
Make a backup of your "C:\Program Files\Datatex" directory.
Make a backup of your
"C:\WINDOWS\Start Menu\Programs\Datatex Gems" directory.
ALSO SEE: I want to move my RUBY server.