Board Thread:Off-Topic Discussion/@comment-35301431-20141201072351/@comment-3076833-20141218030925

http://tumblr.1stplace.co.jp/post/105491166622/days-ft-lia-vocaloid-tm-4-vsqx

Google Translate is saying that those who wish to buy the IA Duo pack (Both IA voicebanks and V3 full efitor) can upgrade to V4 for free.