Help replacing the left side window???

[crispy critter]

The left slide up window in my J3 is cracked at the top and keeps inching its way down the middle of the window. I've tried stop drilling it but I guess there's just too much pressure on it because it just keeps going....its about 3-4 inches long now. I can see anyway to remove the window to replace it unless it will come all the way out the bottme once the handle is removed and if that works I assume I will have to make a pretty long cut in the fabric(width of the window) to remove the old and reinstall the new? Is there something I'm overlooking?? Thanks

 

[bob turner]

 

[crispy critter]

 

[Joe G]

 

[johnhefley]

 

[jimrice]

 

[bob turner]

 

[crispy critter]

 

[glennj3]

 

[luvcubs]