You can use the other buttons in the Job List control to edit the entries in the list.
- "Remove Job" deletes the selected job from the list.
- "Move Up"/"Move Down" changes the placement of the selected job in the list.
- "Configure" allows you to make changes to a job entry.
When you configure a job, the vcf box will say "Loaded". If you want to change the vcf associated with the job you must select another file through the browse button.