Yes, you need to apply again. Please go to the home page of the online application system. You can click on the ‘Apply to another programme’-button to apply for another course.
When you apply for another course, you will have to send a new motivation letter for that specific course. It is not necessary to upload the other requested documents again (e.g. your cv, diploma, etc.), they are already in your application file.
Your new course application will be reviewed by the admission board. If you are admitted to the course you applied for, you will receive a new admission letter.
Please note that in order to apply to another programme you need to have completed the first application you submitted. Otherwise the system will not let you continue to another application.