Their helpdesk site (which hosted their documentation, install links, changelogs, etc) is gone and redirects to desk.com
Last snapshot available on archive.org from June 2019 https://web.archive.org/web/20190607072914/http://help.koken.me/
well their installer is apparently still live at https://web.archive.org/web/20190526161155/https://s3.amazonaws.com/koken-installer/releases/Koken_Installer.zip
should be the latest version 0.22.17 released sometime back in february 2017 (coincidentally)
on a related note i guess i can stop considering keeping my photo site on koken. heh. rip https://photo.trwnh.com for now too
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