This is a method that is so much faster and safer for the fabric.
Here's where I wanted to remove the stitching; the thread on the right is the bottom thread.
Tug on the top thread to reveal the loop...
Slide your seam ripper under the loop then slide it sideways to remove the top thread from the loop.
Here is another loop.
You'll be amazed at how fast you can eliminate those mistakes.
Now back to finishing this quilt!