Amazon does disable features/functions if the device is not registered.
Search the phrase: "fake registration"
or
It may be indexed already in the "Master Index"
IIRC, it is all one big thread -
Start at the most recent end and scroll up - there are at least two file formats, you want the most recent one described.
(Of course, 5.8.9 might have changed the format of that file, but we don't know until someone tries.
)