This seems like an easy one, but I may be overshooting the simplicity a little. Nevertheless, I'll try to steer you in the right direction.
If you launch pro, you will see a section labeled "Headers". Clicking on that section will open up all the headers you are currently using, or have built. You should be able to select the header to either edit, copy, or delete as you please.
Let me know how that worked out, or if I didn't answer the question!