I updated mine a few years ago. (What was I thinking?) Now it nags me every time it is powered on.

Does anyone know if factory reset downgrades the firmware?

The newer gen kindles nag you every time you go to the menu to change books, even in airplane mode. Maybe this can be turned off if you register it, but I'm tired of having to sign up to some company's ever-changing digital contract and arbitration just to read a book.

Specifically, it's a Fullscreen popover that says "cloud not available" which I of course know because it's in airplane mode! You pay 300 dollars and get treated like you're using their device instead of yours.

I couldn't find a way, I was hoping someone better at firmware hacking could help me out but my repeated searches have turned up little