You must first ensure that all athletes have "Unrated" registration status. You can do this relatively quickly by going to "Registrations". There you can filter by "Event:" and choose 1 event.
Then you can select all athletes in the table of athletes and use "[choose action]" --> "Change registration status" --> "Unrated".
Repeat this step for all events in your competition. With a few clicks you should be able to change everyone's registration status to Unassessed. Please note: if there are any athletes who have deregistered themselves, you must first remove them completely!
This has been automatically translated into English