Turn off Cmments in Custom posts

Hi, I am using this theme alongside Coursepress to create courses. However, I am having a problem with blog comments being visible in the courses page. I have tried switching themes and the problem is fixed so I know it's a theme issue. I really like this theme and have spent time getting it to look like I want so don't really want to swap themes. As the course pages are virtual blog pages (ie they don't really exist) I'm not able to g into them to switch comments off - is there a code snippet that I can include in the comments.php or elsewhere to correct this issue. Thank you