How do I hide the author on a custom post type?

I've created a custom post type, and I want to hide the author on those posts. I'm using a plugin called Show/Hide author which isn't picking up the custom post type (on regular posts there is a check box at the bottom of the admin screen whether to show/hide author.) I'm wondering if this is something that I need to write a function for, and if that is the case, if I can get some guidance because that's a bit beyond my skills. Many thanks!