I have idly and accidentally closed File Preview (situated on extreme right) and File Browser (situated on extreme left). I have tried everything I can but they both won't come back. I have even reinstalled calibre. I am using MacBook Air, if that helps.
I am not good with technology related things. It took me 20 minuted just to figure out how to post on this forum. Can someone please help me with this? I'm really desperate for a solution.