In iTunes 12.3.2.35 I've got only an iCloud Download option...an unadjustable column about 3/8" wide with a little cloud in it; I've tried quitting and restarting with the option unchecked, and it reappears every time I launch iTunes.
Oh, well, it's annoying, but it's not a major annoyance, and it should be the worst glitch I run into in El Cap.
Thanks for your input.