You can see a full list of all changes made to Marvin over time in our changelog:
​https://community.amazingmarvin.com/changelog

If you want to see what has changed in a new release the easiest way to do that is to open the in-app changelog. 

Go to "Help & Resources" in the menu at the top right and then click on "See what's new" at the very bottom.

A sidebar with the latest changelogs will appear.
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