Sometimes you have to adjust a rider's score. Here's how.
First, if you just want to adjust scores, here's a great article that shows you how to manually score an event, and it covers how to adjust scores as well.
First, go to manage the event:
Then, from the dropdown menu icon (three dots) on the top right, select "Live Timing":
Then select the race you wish to edit (1) and then select the moto in that race you wish to edit (2):
From there, on the top right you can enter a bike / vehicle number and select Enter. A timestamp will be recorded the moment you click "Enter", so ON THE FINAL LAP, TRY TO CLICK "ENTER" PRECISELY AS THE RACER CROSSES THE FINISH LINE. Prior to the final lap, make sure the racer has the appropriate number of laps recorded.