Click on Manage on the top-left of the page and select Course Sessions.
Look for the Course in the results page, or search for it with Global Search.
Once you find the Course, click View/EditDetails in the leftmost column.
A Session/Class Details box will pop up.
To remove a student, click on the Members tab. To remove an instructor, click on the Instructors tab.
Click Remove in the rightmost column of the desired User's row.
Please note: If the student is removed from the course within the grace period (usually 30 days from when the licenses have been assigned), the school will retain the unused license. After the grace period, the license is no longer reusable.