iPhone 4.0 Beta compile for 3.1.3
I downloaded the iPhone 4.0 Beta. But for my projects I need to compile for 3.1.3 to be able to still submit my projects to the App Store. If I run an old project that isn't a problem I can see all the versions, but when I start a new project I can only pick the 4.0 beta, how can I fix this?
Open your project. In XCode open the project settings (Project -> Edit Project Settings). Choose the build tab, and pick an appropriate Base SDK from the options under the architecture group.
You should not submit apps with beta versions of the SDK. Rather install beta SDKs alongside one for production builds.