There exists, for the PW-3, KT-2, and KV deivces, a copy of the factory update_initial.bin install file.
Edit:
Add PW-2, 2Gbyte and 4Gbyte to the above list:
https://www.mobileread.com/forums/sho...14&postcount=6
They are
**expected to** re-install the initial factory load without regard to what is currently installed.
Currently
**untested** in the field.
You might very well need a serial port connection to recover your device if something goes wrong with these update_initial.bin files.
(But if you have a serial port connection already, you don't need these 'downgrade' packages to get back to your 5.6.5 firmware.
You would only be testing the packages operation for us.)
PM me for a US side of the ocean download link if willing to risk your device for us.
There may be a Europe download location also - just watch this thread for that news.