I just thought I'd post this email I got today regarding older versions of skype:

We’ve noticed that you are, or previously were, using an older version of Skype that will be permanently retired. As a result, after Ju*ly 1, 20*17, you will no longer be able to sign in to these older versions of Skype. Recently updated or started using Skype on another device? Great, you can ignore this email.

To keep talking with your family and friends, please update Skype to the latest version. It only takes a few minutes and all your contacts and conversations will be right there when you sign in.

If you are unable to update, check our support site to see if Skype still supports your device and operating system. If it is no longer supported, you can still stay in touch with friends and family using Skype on other devices. The latest versions of Skype for all supported devices are available at https://www.skype.com/download. You can sign in using the same Skype account.