Although I have set my app version to be 2.0 in my TiApp.xml file, the upload to the iTunes store fails:
This bundle is invalid. The key CFBundleVersionShortString in the Info.plist file must contain a higher version than that of the previously uploaded version.
I checked the info.plist in the build folder, and this key does indeed say 1.0, which is the same as the existing app. The other bundle version string does say 2.0. I have attached the info.plist and the tiapp.xml.