I, of course, love this game.
Windows 10, not so much. But then again, I'm a mac person, so that's not surprising. I will say that I've had almost no trouble playing TS3 via Bootcamp (the only reason I partitioned my macbook pro's hard drive in the first place). It was certainly a lot easier to get the game up and running in Windows than in mac OS, but that's a rant discussion for another section.
@Charlottesmom The update probably reset your options.ini file. You could always save a copy somewhere else and then replace the one in your game folder after the next update. But it's annoying that we even have to do that at all.