I wasn't entirely happy with the shapes on the shark fin, so I improved those. Because the position lights are activated by default on AI cars, I've removed the variants with the big number plates.
Before installing the update, make sure you DELETE ALL FILES in "<Steam directory>\steamapps\common\rFactor 2\UserData\player\Settings\Oreca_07_LMP2_2017\Giedo van der Garde".
If you don't delete the files, the updated skin won't appear!