Starting at the line, peel away the canvas and work some fingers up to the leather strip around the toe. To cut the canvas, have the blade edge of the knife point down and cut towards the insole of the shoe. Pressing the canvas against the insole makes it taut and easier to cut. Continue cutting all the way around the toe.
Lace them up and they're done! They should now feel like a comfortable second pair of socks. Stalls and sets should take less effort and have more control. Now go out and enjoy them, and remember to practice your flipside.