Hey @OlivierE
I believe the best way to get a response about your issue to ask this on their community, maybe you can try to posted on 42 Coins Bitcointalk Thread :
https://bitcointalk.org/index.php?topic=1502028.1880 Some of them still active. Even @Lasergun who created the thread of 42 Coins still active until now so maybe you can post them and he will try to help you for your question.