Please find the kcb-release.apk file in this zip file on Dropbox:
https://www.dropbox.com/s/dnj88i5mof...lease.zip?dl=0
For no clear reasons, Dropbox does not allow me to share the apk file directly.
Additionally, here is another copy for the kcb-release.apk file from Boox Lumi 2:
https://www.dropbox.com/s/uv0sozfgdz...Lumi2.zip?dl=0
At the end of the day, I plan to toggle such "Finger touch" setting on Lumi 2, where icons are harder to reach due to the larger screen size.