Yes, the Steam release is exactly the same as the itch.io one, with the exception that you can also have trading cards, which can compensate the game's price a bit. And thanks, I'm glad you have interests in the game!
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The game itself is 32-bit and only requires a very old OS (Windows XP SP2) or higher. Did you download the game through the itch.io app?
Windows 7 Ultimate should be way more than enough to run the game.
itch.io community » Game Development · Created a new topic Gone In November - A short game about depression.