We like to quote Rich Formidori on Korg Forums:
Thanks for your patience. The Editor/Plug-In Editor software for the Kronos is now available for download at www.korg.com/kronos/support . Click on “Software” for the editor, and please make sure you also visit the “Drivers” section to download the latest USB-MIDI driver.
We’ve also released OS v1.6, which is required to run the Editor/Plug-In Editor. It can be downloaded right from the “OS” section of the support page. In addition to various bug fixes, this update also adds an “Uninstall EXs” command, which will completely remove selected EXs data from the internal SSD.
Technology Product Manager
Korg USA, Inc.