I can't open my edit in premiere as its saying it was saved in the newest premiere?
I just tested it, and you can successfully import files from CC to CS6 via exporting to final cut pro xml and then importing that xml back. This should work with any versions, though there may be a few issues if some newer features are not supported, or cannot be exported to final cut pro.

This requires that you would have access to the latest version of premiere on any computer that can access the file.