To check the history of a resource, you have to select the “Templates” page. In the left sidebar, you have some folders that you can open: My Resources and Shared Resources. You can open any of them and then list with all the resources of the selected type will appear. The next step is to select the resource file and then you will be able to see the details about the selected resource. In the central panel of the screen, you will see a list with all the events that have occurred with the selected resource(uploaded on and modified on).