Tilt latch

I purchased tilt latches that slide in from the side, and noticed that my latches do not slide in. They are not entirely internal and use no screws, but have a tab that sits on top of the window. They seem to pop in to a hole from above and then have that tab sit on top of the end of the window. I have 5-6 window with this type of latch broken. Can you help?

I have not been able to get one of the old latches out. I will ask some to help me do that today. If you know how I can best remove them when they do not slide, or have screws, let me know.

Looking at the latch while it is in the window, it is 2 7/8 inches long (the portion showing above the surface on the window). The main body of the latch is 3/4 inch wide and the tab portion at the end that sits atop the window surface is 1 7/16 inches by 0.5 inches. The portion that has the latch you pull back is 1.5 inches long.

Thanks for your help.

Thanks for your help.