I can confirm that the 2019 version is out everywhere, except in Japan and some partner websites.
The only way to get the latest 2019 is by uninstalling the 2018 version and downloading a new installation kit trough Bitdefender Central. In the near future, the customers will receive an automatic update trough the already existing 2018 installation, that will prompt them to restart the computer for Bitdefender to apply the updates. The customer will then be greeted with the new 2019 version, and a small tour for the new interface.
To ensure the process goes smooth if you want the 2019 version, I would suggest using an uninstall tool from
here before downloading the new update.
NOTE: If you have any wallets or vaults, export them before using the uninstall tool!