I am trying to upgrade my exising FlashBuilder 4 project to 4.5. I installed 4.5 and pointed it at my existing project, but FlashBuilder told me that it's an existing 4 project and can't be used in its current state. So I tried to create a new project in 4,5, but apparently the required directory structure has changed, Under FB4, I have a "src" directory containing my Java server stuff, and a "flex_src" directory containing the Flash code. I don't know if that's right any more. Is there, somewhere, a step-by-step guide on how to do this? Something like "Upgrading Flex Projects for Dummies" or some such?