Mabye it’s something I haven’t found in the documentation.
But what is the recommended way to update an installed Litium app?
For example if i want this Klarna app to be 1.3.0?
Litium version: 8.2.3
Have you upgraded the Klarna App? I mean the web application, not the App page in the back-office.
For test and production you need to contact support and ask them to upgrade the apps.
Okey thanks. Thats good to know 
Can you add that to the docs?
What web application are you refering to?
Yes, it is now included in the documentation: https://docs.litium.com/documentation/litium-apps/litium-app, and individually under each app.