Since PySimpleGUI 5, released on February 12, 2024, it becomes not possible to use the up-to-date library versions:
Distribution opportunity costs $99 per year;
Not compatible with MIT license.
Therefore, the project remains on PySimpleGUI 4.60.5, released on May 22, 2023, until the TCT's GUI would be rewritten with another library, most likely PyQt or PySide.
Since PySimpleGUI 5, released on February 12, 2024, it becomes not possible to use the up-to-date library versions:
Therefore, the project remains on PySimpleGUI 4.60.5, released on May 22, 2023, until the TCT's GUI would be rewritten with another library, most likely PyQt or PySide.