Once completed a flight where you have imported a flight plan from SimBrief, how can you clear this and load a subsequent flight without exiting the Sim?
The way I do it is enter the new route in the INIT page, EX: KSEA/KRNO. Once that is entered, you can exit, then go back into INIT and click …what is it…one button down R2 from the route- INIT Request. Your new route should upload.