[Antoinekamel]

I've tested the solution below with my Touch and my Paperwhite, seems to work on both, and without side effects. Now KOReader exits normally and the Kindle home screen is shown completely, with menu bar. Two steps, all inside the "koreader" folder:

Spoiler:

ONE: Change the following function on reader.lua (line 176 or a little more) with the following:

function FileManager:onClose()
		os.exit()
		return true
	end

TWO: Change the default Kindle language to English (US).