I moved my papwerwhite 1st to 5.4.4 (as per Device Info). I did not feel confortable w/o JBPatch and decided to go back.
Then I copy the 5.3.4 to the root, safely remove the device and... The file disappeared!
now way, the bin file disappears quite immediately (the update is always grey, of course).
Any hints? many many thanks. Ciao