Xcode

Hello. I have MacOS Mavericks and XCode 6.1

XCode freezing all the time when I click on Images.xcassets or try to open App icon in project preferences. When I delete this file and folder and create new custom .xcassets file without folder named "App Icon set", and click on this file in Xcode it open assets catalog, but if I try upload images it freezing again.

I try to delete Xcode and reinstall agai, deleting derived folder, clear cash, restore preferences to defaults. It freezing again and again.