Could you please mark the executables with the correct platform? Right now, if you're using the Itch application it will default to downloading the first one -- which is the Mac version -- even though I'm running on Windows.
Oh sorry about that! I've fixed it. Thanks for your other suggestions, too, those'll require some more thought but I am definitely going to poke at them.
Itch didn’t quite know what to make of the change. It said there was an “Update” but then didn’t know what it was. I just uninstalled and reinstalled it and it was all sorted out.