So on Artrage 4, all duplicates of the layer stay the exact same after multiple use of the transform tool to move them, that's what's not doing AR5 anymore since today, after a crash during a save.
I've backed this folder AppData\Roaming\Ambient Design\ArtRage\Content in hope my settings, brushes etc will be working again, I will try to reinstall AR5, I don't see any other solution.