On May 8th, 2019, Creative Cloud users have started receiving emails from Adobe stating that older versions of the products they are using have been discontinued and that users are no longer licensed to use them. For many of these developers, this not a reasonable request as they need to utilize older versions for certain projects. […]

from https://www.bleepingcomputer.com/news/software/adobe-says-upgrade-creative-cloud-apps-or-risk-3rd-party-claims/