How do I fix broken clips?

The fast and easy way to remove the fold at the end is to cut the strap as close to the fold as possible. That will shorten the length of the strap a bit. I pass the cut end of webbing through the flame of a cigarette lighter a time or two to melt the end.

But if you want to preserve the length of the strap, take a pair of scissors with a narrow, sharp tip and cut the stitching on the fold. When the color of the thread is the same as the color of the webbing, the stitching can be hard to see. And cutting straight stitches is easier than cutting a bar tack. But it can be done and doesn't really take that long.

After putting on the new clip, fold the end of the webbing over and resew. If you removed the stitching of the fold, there will be needle holes in the webbing and if you can find them you can probably resew the fold by hand with a regular needle and thread. If the needle won't go through easily, a pair of pliers can be used to push it through. If you have access to a sewing machine, it will probably be able to handle the stitching as long as the thickness of the folded webbing fits under the presser foot. In my experience, a sewing machine needle penetrates webbing fairly easily. I do it all the time on my home sewing machine.