annoying multiple cursor behaviour instead of normal multiline selection after update

I update my pycharm to 3.4 version and now, when I just want to select a couple lines of code (which is standard industry combination) for quick delete for example and using 'shift + arrow' shortcut  it creates multiple cursor on each line. I don't need this feature, I want to disable it. How I could do that. New behaviour is very annoying for me.