What is the Skype Chat Theme?

Question

Skype

Hello.
I saw an unusual Skype chat interface from a colleague.

He says that he did not make any additional changes, but simply downloaded it from the official site.
It looks like this for me:

Both he and I cleaned the poppy from Skype and its files completely (AppZapper), then simultaneously installed the off. distribution kit. As a result, a different interface, again.
What kind of modification is on the first screen?

Answer 1

Maybe a beta version or just updated.

Answer 2

This is a beta version of Skype with a new interface .