We use non-persistent Citrix servers for our infrastructure and when we update 64-bit versions of Adobe Pro DC, we are having to go into the registry and redo the keys that allow for multiple users /shared devices. This is only happening to 64-bit installs and seems to have started back on the August planned update. This seems like a bug since 32-bit versions of Adobe are unchanged after updating. Both versions are updated in the same fashion, via a script deployed from our RMM platform. I did work with support originally and they suggested I check the registry after every update which is not a fix.