Thanks to all.
I forgot to mention that:
The plugin have now the feature to reuse the last saved roof.
Condition: to be the same roof projection(s) without modifications.
Then, when OK, you will be asked to replace or not the existing roof.

@hansmex
I've chose you for this because 10~12 years ago you made a good tutorial about plugins usage.
Many years was a little bible for me.
Wile I've remove help button I intend to add an specific entry under the Help menu (like for wiring and 3D dimensions).
In this case will be good to have some gif.
Thanks for availability!