Is Adobe Creative Cloud Desktop really requiring Windows 10

It is stated on the adobe Website: The Creative Cloud desktop app has the following requirements:

Microsoft® Windows 10 (64-bit only) and later

I have two computers running Windows 7 / Windows 8.1 

CC desktop was working correctly on both computer, but recently I discovered that it doesn't work anymore (spinning wheel on “applications load” => error messages inviting  to reinstall which does not correct anything)

Am I obliged to upgrade to Windows 10 to be able to continue to manage applications and updates?

Thanks