It is a goal of ours to become a standard multi-table storage format! However, today we are still in beta and have made some breaking changes in the last few releases. (Exporting from the old version, then reimporting your DB in the new allows you to upgrade!) Those should happen less often as we move forward (the storage format was genericized a bit and is more resilient to future enhancements now), and locking in our format amd guaranteeing backwards compatibility will occur when we go to 1.0!