no kepub in my library, so I suppose I must be using the extended driver (though I did'nt intended to : it's a new computer (the old one having died after 9 years of good services) and a new device, as, as I said before, FNAC store didn't even try to reset mine and gave a brand new to me. Perhaps should I delete (or disable) the kobo touch extend driver.
I'm quite sure I did something wrong (and not Calibre being faulty) as it's a bit hard to follow exactly the post to activate the right options as Calibre is yet in French and the instructions in English. I should perhaps set Calibre language in English to make it easier (I understand much more in English, thanks to my reading a lot in English) than I write (or talk) it.
Thanks a lot for your help Technisol and David for