I used Xcode 4.5 to create an iPad application yesterday and completed it. But today, when I took the same Xcode project and tried to run it on an old computer running Xcode 4.2, it gives me an error about IBNSLayoutConstraint. I think this is due to the new features that were included in the new Xcode 4.5. So I thought there was a way to open a project from a new Xcode in the old version without having to install a new Xcode and OSX.

I'm not sure if this question is asked here or not, but I tried to find a solution, but no luck in that.
PS. I already know that the best solution is to abandon these projects in the old version, but this is not what I'm looking for.
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