Window glass inserts

I am looking to shrink wrap a couple of windows for the winter months and would like to figure out how to remove the interior window handle only so the wrap fits sung. I don't see a screw to do this but there is a small hole under the handle, not sure if it has a very small screw or if it is pushed with a pin and pops out. See 2 images taken with my cell phone, silly question but I can't see a way to do it easily. The third image shows a crop of the handle arm, this is all I need to remove to make it work. Thanks for any info or help.

That title might be hard to understand - let me explain. My house has the original 1966 full frame, double pane anderson windows. They have, on the exterior, the old , triple section storm window/screen setup. That appears to be what I would call a cartridge, screwed on and separate from the window itself. I believe these windows are sufficient - probably better than late model vinyl replacement/pocket windows - maybe. But anyhow, the reason I'm asking this is because I need to wrap my wood trim in aluminum because it's all rotting out. I don't want to invest the time in the aluminum wrapping until I do something with the windows. Rather than replace the windows, all I really want is just a full size screen, the type that pop out, etc... What are my options to get rid of the storm window setups? Am I just up against a choice of replace windows or don't replace windows? Thanks!