If you navigate to Skype website from a Windows 10 machine look like there’s not way to download the so called “classic” version, you are redirected to the Windows Store.
I still prefer the classic one so I’ve found the direct link to the ‘classic’ version http://bit.ly/skypeclassic but if then you the run the installer you will get this sad message:
To, solve it, right click the installer file and select Properties, navigate to Compatibility tab, select Windows 8 and click Apply
And you’re done 
Happy ‘classic’ Skyping 