What part is not working? Keep in mind this mixer uses toggle buttons. This is quite common for devices where midi control is not its main purpose. Momentary switches are preferred
1) You can use any text editor you like, On windows I usually use Notepad++
2) You can use the generic midimap or the one posted in this thread as a template to suite your needs
3) The values are hexadecimal, the midimap use decimal values. Use any Calculator program to convert, there are many
hexadecimal converter sites you can use to
4) Channels are zero based, try by subtracting 1
Cuelux was designed to be as simple as possible for most users. Only very few actually make changes to the midimaps.