bottom right corner

My Alside windows: The piece that prevents the window from falling out when it is tilted for cleaning has broken off and is stuck in window. I think it is some type of pivot lock shoe? The piece is from the lower right hand side of the window. I have purchased several parts from you in the past like screen window latches, window latches and lock and keeper with great repair success(from your GREAT instructions), I hope this part is no different. The piece is roughly 1/2" deep(thick), 1 1/4" wide and 1 1/2" long. I do have cut outs at the top to remove the pivot shoe. There is some sort of stop in the way to remove the shoe, do I unscrew that piece? The shoe cam is broken so it is hard to move freely but I think there is enough play, I should be able to force it to the top and remove.

Thanks in advance,

Gregory

After looking at your instructions on You Tube, it appears the stopper with the phillips screw is the coil balance. I looked at your instructions online how to replace. I just need to figure out the coil rating, but don't understand how to get that measurement? I did not see a stamp on the coil. What type of coil balance to order? I will need to replace both on this window, both are now broken when I removed the
lower window. Thank-you so much!