I managed to find it by opening KUAL, going into HELPER and there's an option called "Save and reset log" or something like that. Then it will create a log file at the documents folder.
Also, can you please try to give me any insight with my problem? I can't seem to update KOReader through KUAL menu, here's my post:
https://www.mobileread.com/forums/sh...d.php?t=326052