This is the message I get during update.
Hi Hank,
This can happen when you switch between different sign-in accounts, with different permissions, e.g. beta vs public, and then try to install an update. For beta discussions please contact Altium offline.
The update 1.4 is not yet publicly available as it is still in beta (but coming soon!). The current public version is 1.3.0 (Build 26). If you need to reinstall, please download the installer from http://www.circuitstudio.com/download
The download file CircuitStudio-eval-1.3.exe is used for both the licensed and eval versions of CircuitStudio.
Best regards,
James Harriman
Altium