You can purchase the upgraded version from the previous version.
There is no free update.
To upgrade, you need the "serial code" of the previous version.
The following items are subject to upgrade.
· VOCALOID3 Editor
· VOCALOID4 Editor
· VOCALOID4 Editor for Cubase
If you upgraded from VOCALOID3 to VOCALOID4 in the past, please prepare "Serial Code of VOCALOID4" obtained at the time of upgrade.