To Update, or not to Update?

Well, I sold my first e-book - I couldn't resist clicking on the little link that tells you how many books have been sold. What a thrill - it's all going to be worth it. I have found a 69-page instruction book on how to format a book for e-publishing - and realise that I have not being doing it properly. Now I'm not sure if I should remove the books that are already up there, or just carry on and then go back and tidy up the original books. I'll probably just leave them for now.

I'm working on the very first romance I ever sold right now, and it wasn't that long ago (honestly) but how the world has changed! My heroine has videos. There are no mobile phones - not even the secret agent hero has one! She lives in Japan and her family write letters to her. No email, no Facebook. Her father loses some 'slides' that he needs for a lecture. Nobody looks anything up on the Internet, and people smoke in restaurants. Would you update it or not? I think probably not, on the whole, it's of its time, let it stay there.