[Update] ver1.19.1 has been released.

New Features and Improvements

In the Advanced Settings and System Settings screens, the Key Config tab has been added. This contains the key mapping settings for both 2LANE and 4LANE, with their own tabs within the Key Config tab.
Added separate key configurations for Quick Retry and Speed Up/Speed Down (for in-game scroll speed adjustment).
Added a button on both the Advanced Settings and System Settings screens that allow you to switch between the two Settings screens.