KUAL problem on 5.9.4 - KOA ver. 1

I have a KOA ver.1 and upgraded it to 5.9.4, then reinstalled KUAL but it gave me blank screen, after several times of uninstall/reinstall I made a mistake: I deleted the KUAL booklet，then tried to install KUAL again, but the booklet never appears.

https://www.mobileread.com/forums/sh...highlight=kual
this artical gives a solution to the KUAL blank screen issue, I tried to run "runme.sh" before and after uninstall/reinstall KUAL but still the booklet is nowhere to be found.

I tried with the latest version of MRPI and KUAL on this thread:
https://www.mobileread.com/forums/sh...d.php?t=225030

anyone here can help me with this? many thanks in advance!