I set up calibre on my desktop for my wife's KoboVox & converted 198 mobi files to epub & put them on SD card for her. I then wanted to put the same converted files on my KoboArc but with no success (no SD card), on watching the demo (if in doubt read the instructions) I noticed that instead of the "save to disk" icon their was a "device" icon. I wish to change calibre to recognise a tablet rather than the Vox but even when I remove calibre & try re-downloading I don't get the welcome screen which allows you to choose your devise. What am I doing wrong? Advice in words of one sylabble please I'm not feeling very bright at the moment.