Default SOLVED [Q] rerooting via recovery?

Never mind, it turned out that what she'd done was uninstall supersu, so reinstalling it from the market actually fixed things, after a reboot.

A not so techy friend whose tablet I had rooted somehow managed to unroot it. But TWRP is still installed and functional. We're about 600 miles apart, so I can't easily reroot it for her, and I spent 3 hours tonight trying to walk her through autoroot via chat, and it just will not work.

Is there a way to reroot via twrp?

She's on 4.3, build JSS15J.P600UEUBMK1
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"Well-behaved women seldom make history."-Laurel Thatcher Ulrich