AppleInsider:

Users of older versions of Creative Cloud apps, including Photoshop, Premiere Pro and Lightroom Classic, have been told by Adobe that they are no longer licensed to use them, and anyone who continues to use these versions could face “infringement claims” from other companies.

Users of older versions of Adobe Creative Cloud apps including Photoshop have been told to stop using them or face potential “infringement claims” from third-party companies who are unnamed but suspected to be Dolby. Adobe cites only “ongoing litigation” as the reason for the abrupt announcement.

I got my “cease and desist” letter. Adobe continues to make decisions that hurt average customers. It’s unlikely individuals would “face potential “infringement claims” from Dolby and Adobe is just using the wording as a scare tactic.