Skype is removing support for Skype 7.0 "calssic" in November and encourages everyone to update to V 8.0.

As we continue to focus on and improve Skype version 8, support for Skype versions 7, and below will end on November 1, 2018 on desktop devices and November 15, 2018 on mobile and tablet devices. Although you may be able to use older versions for a little while, we encourage you to update today to avoid any interruption.

[blogs.skype.com...]

The frustrating thing is that i've always had problems with the newer version of skype, so have continues to use older versions. Even then, the older versions still have problems.

Skype used to work well before it was acquired, imho.