I have a similar question. I have used the Android version before, but now I'm using the iOS version (with a Gold subscription). I have a recording that I stopped too late, and now I want to delete the part where we were already driving in the car. However, in the web-editor (route planner), I can only delete the automatically placed waypoints, but I didn't find a way to split the track at a manually selected point and then delete one half.