I want to use a coupon code with CoursePress Pro

My client wants to offer coupon codes for her upcoming course, and I know two things:

– Marketpress has coupon code functionality

– Marketpress is part of CoursePress

However, I can’t find anywhere to edit MarketPress settings, and I do not want to just install the full MarketPress plugin when I already have CoursePress in there, without knowing what it might do.

Suggestions? Thanks in advance!