Edition means the Original and Version means improvement over it. For example Let's talk about Windows Vista. Windows Vista has several Editions like 1_Vista Home Basic, 2_Vista Home Premium, 3_Vista Ultimate and some business editions too(I dunno about them). But at the same time Microsoft has launched some new improvements in the form of 1_Service Pack1 OR 2_Service Pack 2. These are versions.

Hello Babypink, Jura mentioned a software example . Talking about books an edition would be all numbers of copies of a book printed at one time and all identical or a single copy from this number ( the first edition) .It could also refer to other number of printings of the book issued at separate times with modifications and amendments such as extra chapters or updated statistics. A version of a book would be a translation of it from one language to another. The English version of a Chinese novel. It could also refer to a novel (book) that has been recast in a new form.