Microsoft just released a new one version of Skype for Windows.
Of course to the question "why should you inform?" no one can answer, as according to Microsoft's new policy we do not need to know…
So although there is no data on what to expect from Skype 7.18, the new version may have to include bug fixes and performance improvements.
Again to mention that a specific version is only for Windows computers.
You can download the new app from the official σελίδα of Skype or Whatsapp.