It could be done by including code for each version to load the data. We don't provide this in our runtimes because 1) it adds a lot of code that really isn't necessary, 2) the runtimes are not guaranteed to work exactly the same across versions. It is better to just export all your projects with the same version as the runtime you use.
In a week or so we will publish a blog post that describes how to easily export all your projects using scripts that we provide.
