If KOReader is launching before step 5 that means you've already got an active fmon going or something. @NiLuJe knows more about that topic. You could also try
https://www.mobileread.com/forums/sh...d.php?t=314220 instead
As an aside, for the stable releases you should go to
https://github.com/koreader/koreader/releases or
http://build.koreader.rocks/download/stable/
See
https://github.com/koreader/koreader...n-Kobo-devices for the most up-to-date instructions.