This is version 4.60.5, one of the latest versions before they made it license only. If you want a nice gui package with no strings attached, here you are.
The developers of PySimpleGUI have pulled all older versions, opting for 'licensed' variant for versions 5 and above.
Put these folders inside whatever coding directory you are using, or extract the PySimpleGUI.py file and use that only.
Or you can put all of these folders here:
Windows: AppData/Local/Programs/Python/Python312/Lib/site-packages
This should emulate as if it were installed by pip, as I just grabbed all the pysimplegui folders from there.