Since this is a beta version, there might be some bugs left, and that is normal. Only English and Japanese user interfaces are up-to-date. The Help is not up-to-date.
This beta release can be tried with a registration key for v12. Registration keys for v13 will be different from the keys for v12. When v13 is released, some customers will need to purchase upgrades. If you purchase v12 now, you will receive a free key for v13 when v13 is released.