[serdar0020]

I had the same problem, by mistake I signed with the Aura One out of my Kobo account, then I had to log in again, Nickel automatically updated, catalogued again all my books even though they are in the hidden *.folder, about 10% of my books got deleted in the process (edit: I have backups), and only after several crashes did I manage to re-install the one-click install package. I now have several items on my home screen I can't get rid of (parental controls are activated), I can only power off the device through the koreader, and every new book is being archived by Nickel. (I did run the ps1-power shell script)