Is it possible to cancel a long running, screen data export?

Summary:

I'm trying to export Order headers and realized after I already triggered the export that I missed a parameter. This export takes a significant amount of time to complete, and when it completes, it will not be what I need. Can I cancel it, change my criteria, and then export? Or should I just go ahead and trigger a second export (using the correct filter parameters) and hope the two don't bog the system down?

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