@Zero_ego: You need to enable Private Messaging. This is in the "Edit Options" of the control panel. If this isn't there, it has to be added somehow. A recent person who had this issue solved it in
https://www.mobileread.com/forums/sh...d.php?t=319819.
As to tools, I don't know what "Etcher" is. If it is an image writer for SD cards, then it should work.