Benewake tf mini Lidar/ PX4

I have the STB adapter set up to start programming per U tube instructions but the download wont respond on the Benewake web site. All it does is ask for sign in and provide information on their products when download is pressed. Is there another download source. Unless i missed something on how to set up Mission Planner i continue to get error message

If you’re using MissionPlanner then you probably want to ask in the ArduPilot forum: