This update adds the ability to link data from the current arcade version (SOUND VOLTEX IV HEAVENLY HAVEN) if present. Linked data includes high scores/medals, in-game currencies (packets, blocks), as well as unlocked songs, appeal cards and NEMSYS crew navigators. Additionally, on the TRACK SELECT menu you can choose whether or not to show the better of your two scores from the PC and arcade versions. See here for more details (in Japanese).
The update also adds 8 new songs to the REGULAR course, one of which is an SDVX CLOUD exclusive song "Nexta" by lapix. Difficulty-wise, Nexta is 6 / 12 / 15 / 18 for NOV / ADV / EXH / GRV, although the GRV difficulty needs to be unlocked via BLASTER GATE. The other 7 songs are Touhou arrangements present in the arcade version -- 6 songs by FELT, as well as "弾幕注意報2014" by 東京アクティブNEETs.
Finally, a small adjustment was made in the launcher's settings menu which improves the initial ranking behaviour of the display resolution option in the case where multiple displays were detected.