Manually Update Clicks, Sign-Ups, and Paid Membership Fields?

Hey there,

I'd like to use the affiliate plugin to track offline sales. I see that I can change the column headers of "Clicks", "Sign-ups", and "Paid Membership" to be anything I would like which is cool. However, is there a way to manually update those numbers so I could use them to track offline sales? Can I increment them manually somehow?

Thanks.