Hmmm - I have not used MrPI - is that my error?
When I downgraded before to 5.3.3, I used the software from
https://www.mobileread.com/forums/sh...d.php?t=264432.
Then I followed the screensavers hack at
https://www.mobileread.com/forums/sh...d.php?t=195474 . This is where I got the python from - the file is attached to the bottom of that thread. I unpacked the zip and copied the bin onto the root of the kindle to install it. That is what I tried to do again now. I copied it onto the root and after ejecting and unplugging, there is no option to update.