Do note however that we don't guarantee backwards compatibility of the scenes! So while you will be able to go back to Corona v4, your scenes created in newer version might or might not work. Worst case they will crash and you'll not be able to continue with your project. Of course, they'll work in the newer versions, but it might take some time before those are fixed. So never switch versions when working on a project and don't use daily build versions on critical projects!