@cedrickm You need to acces to the Webmanager
https://github.com/recalbox/recalbox-os/wiki/recalbox-manager-WEB-interface-(FR)
Then go to recalbox.conf
Then find the line :
updates.type=stable
and change it to :
updates.type=https://review-507-b*mp-b-0jn0c0-archive-review-prod.recalbox.com
Hit save button
Restart