Ever imported someone else's deck that contained scheduling information associated with cards? It's really annoying. Until now, the only way to fix the problem was to re-export the deck and un-check the "Include Scheduling Information" checkbox.
Well, no more! Install this add-on, go into the card browser (click the "Browse" option from the main deck browser). Select some cards (maybe with Control-A?), and choose the Edit menu option: "Reset scheduling and learning on selected cards." If you don't like the changes, you can always Edit -> Undo (Control-Z) afterward.
This add-on also allows you delete your own scheduling information. I acknowledge that this usage case breaks the spatial repetition concept and goes against the spirit of Anki. If you do this, you risk having uncomfortable dreams, and all flowers within a ten-meter radius of your position might suddenly and spontaneously wilt.
Jeff Baitis, [email protected], June 18, 2015