Instaling Version 4.0.1 trouble

Software
1

i have made pcb with old version (2013).
to day i install new version V4.0.1
when loading old PCB, error arrives : "la couche "Dessus.Silks’ n’est pas définie.
this bug is explaine in "migration from old stable " on KICAD HELP page.
I MUST CHANGE LAYERS NAME…
but how to do that ?

thanks for helping.

2

You need to open the .kicad_pcb files with a text editor (notepad, …) and change the text as detailed here:
https://kicad.org/help/migration-from-old-stable/