thanks that was the solution.
I am now working in the ESP3 Ligier, but as son as I open the file, the visual is almost full black. and anything i do in "paint here" layer is not visible. I guess some layers are not well defined in terms of modeor opacity. for instance the frame wire is normal with 70%, but other layers should have also wrong defintions and im not sure which ones.
Could someone give me a hand?
I have tried using Adobe Photoshop or Gimp and its the same