Fix the WINDOW SCREEN MESH FRAME.

Here is a recording of our window setup - it has 3 tracks. The screen frame that holds the mesh is broken. Either we fix it or replace it. To fix it, we need to pull out the corner keys that are stuck in place. I tried to drill them out and that did not work,. The screen frame with mesh that is in this recording is NOT broken. I wanted to show you the setup.