Xcode 6.4 iOS device/Simulator and Scheme option disappear in OS X El capitan

I've update Mac from OS X Yosemite 10.10.4 to OS X El Capitan 10.11.1 recently. After OS update the iOS device/Simulator list and Scheme option that appears right next to build/run option disappeared completely. I'm using Xcode 6.4.

I've found something new feature >> button next to Utilities tab on top-right corner after update to OS X El Capitan shown in screenshot. After clicking >> button Scheme button appears but is disabled.

Is this any kind of big or feature? Any fix/workaround?

Got fix for using Xcode 6.x on OS X El Capitan.

For Scheme :

You can select scheme using Product menu -> Scheme -> Select Scheme

You can also edit, manage or add scheme using above steps.

For Destination :

You can select destination using Product menu -> Destination -> Select destination from drop-down list.