For example, I have the installation of Activiti 5.6. I want upgrade it to higher version and save runtime data. How can I do this? Earlier I thought, that I must to download .zip archive with Activiti, unpack it to another (other than 5.6) directory and run demo.start… (In this case all my runtime data was left in version 5.6) But after you words… Can you explain in more detail how to upgrade my installation of activiti?
The demo-install is what it says.. demo. This can't be upgraded easilly (unless you copy the h2 data to the 5.7 demo setup).
In normal apps, it's sufficient to upgrade the activiti jars to the new versions, and depending on your upgrade-strategy, it will be performed automatically…