KAC is not exactly functioning with the current patch (hopefully it'll be updated soon, because I don't know how to be a Kerbal without my alarms, apparently). If you remember where all the buttons were you can still kind of use the mod to set alarms, but as everyone mentioned the icons are gone, so you're going to have to run off memory mostly. However, quite frequently if you try to use the alarm menu to jump to a craft, the game will crash, so I don't recommend doing that.