All mega.nz links are already down, including the walkthrough.
Sorry about this, was made aware that there is a problem with the Mega files, the files were corrupted during the upload it seems, first time it happens to me and at the worst timing.
In the meantime, 1fichier files works, will send fixed link for the Mega later through mail. Shouldn't happen anymore, I'm switching to a folder system so if there is a problem, there will be no need to redo the links or resend something. I don't want to spam anyone. Learned the lesson.