The new version of the Iota wallet came out this past week and there has been some panic as people check their 2.3 version to find it is empty (or at least it APPEARS to be empty). Do not panic if this is you; there is a very helpful step by step instruction article on the Iota website to guide you through implementing the 2.4 version. Here is a link to the instructions:
https://matthewwinstonjohnson.gitbooks.io/iota-guide-and-faq/getting-started/guide-transition.html
If you rather find it yourself just check the forum under "community" at the bottom of the Iota website page. Many people are asking about the new wallet so you'll get lots of info there. Good luck fellow travellers!