Xcode 5 - “iOS Simulator failed to install application” every time I switch simulators

Question

Using Xcode 5 GM, anytime I switch to the 5.1, 6.0 or 6.1 simulators to test, I get the error \"iOS Simulator failed to install application.\" When I reset the simulator it

Answer 1

/Users/YOURUSERNAME/Library/Developer/Xcode/ --> remove all contents of this folder, then simply launch the app from Xcode.