The Smart Fan control seems to have been relocated to the System Information Viewer utility, available on the website. (At least for the Z87X-UD5H mobo.)
Seems a lot of utilities/apps have been renamed and/or moved to other apps lately. Worse, many of them either flat-out don't work or offer severely limited functionality. For example, one app (don't remember which, as I've uninstalled them all in disgust) displays the info for my Crucial 480GB solid state system drive, then says right underneath it "Warning, no SSD drive detected." Asinine. The Smart Recovery2 utility installed to my x64 directory, whereas every other AppCenter-supported utility has installed in the x86 directory. AppCenter doesn't even see the Smart Recovery2 installation.