Whether you are a Hobbyist User or Commercial User, you can start using PySimpleGUI at no cost. To get started with a 30-day trial period, first install Python and then
python -m pip install pysimplegui
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You can try PySimpleGUI for 30 days, after which you will need to Sign Up. Hobbyist users sign up at no cost, and Commercial Users subscribe at $99/year. For more details, see PySimpleGUI.com/pricing.
How is this trial enforced?