6.1 Is breaking my app

I wish I could downgrade. I’ve lost 3 hours today trying to get my app working again after this upgrade. The easy part was the update with Swift 1.1. The hard part is that my app no longer loads on my iPhone, and the simulator won’t even start. I hope I can get this running today. I don’t want to lose more than a day of productivity because of an “upgrade"

The Calgary Herald about Xcode, v6.1