I payed for season 6 consider my season 2 purchase a donation to the game development. Going forward.but in the future it would be good to know ahead of time of changes like these.
I totally agree that the idea of a season pass should have been introduced when I launched Ep6 on itch.io, but the idea came to me after that - exactly to be able to adress the situation you experienced.
So from now on, that will be the norm :)
Thank you for your contribution to this project - it keeps the work going!