I have exactly the same question as the question here: Xcode 6 - How to pick signing certificate/provisioning profile for Ad-Hoc distribution?
I've regenerated a profile which I downloaded and have installed but whenever I try and export to an ipa to upload to Testflight, I can't change the profile it wants to sign the ipa with and am forced to sign it with the XC provisioning profile. How can I change this? And if I wanted to install Xcode 5 to sign it off with, I can't seem to see how to do that?

Thanks,