Novice question

[Philippe Hurbain]

Thanks. This what i looking for. Another question where i find compendium or HOW TO use LPUB3D, because as total novice

https://sites.google.com/site/workingwithlpub/ is probably your best source. Tutorials on Lpub (not 3d) are also a valuable source since LPub3d is not so different (it's an evolution rather than a revolution   )

i can not change simple things as color of single part.

This is not the purpose of LPub which is an instruction generator, not a model builder. Use your favorite LDraw editor to give the parts the intended colors.
Note that if by 'single part' you mean element of the building instruction such as page background, then right click on it... Right click and contextual menu is the way to work with LPub. Only problem is to right click in the correct place, as right clicking on background is not the same as right clicking on model, nor parts list and so on...

Using File Editor only is not user friendly at all.

You should not have to... As said above, right click everywhere till you find what you want. A few global things can be changed from preferences menu too.

Now if you tell me that LPub is not extremely user friendly I'll have to agree, but making BIs exactly as you want is... extremely complex