The old SwarmIt tool is borked, so here's a new one custom-fit for the new engine.
How to install? Find the SwarmIt image at the top of your screen, click down on the "Drag me" link to its left, and drap-and-drop that into your browser's toolbar. Delete the old one via your bookmark manager, and rename the new toolbar link while you're in there.
Use it in good health, meeplits.