Unified Developer Core cannot be upgraded to version 25.1.5

[Jan Keller]

In order to update the App Engine Studio, Unified Developer Core must be upgraded to version 25.1.5, but I cannot order this from the store. I am always shown "This version is already available as part of your purchase of 25.0.4 version of this app".

[Mark Manders]

The store usage isn't making it easier, because it is very buggy and you'll be missing updates all the time. I had the same once and it took NowSupport to get it right. You could try uninstalling and installing, but looking at what it is, you may lose things you don't want to. I would create a case with NowSupport. 

[Jan Keller]

Alright, thanks for your help Mark!

[Jacques Clement]

What worked for me was to (from the All Available Application screen) repair the currently installed version of Unified Developer Core (25.0.3). Then I could upgrade just that one component to the latest version, and finally the application that it was dependent on (Process Automation Designer in my case).

Hope this works for you too!