Both interactive elements and addons are updated regularly. When a project contains interactivities which new version is available for an update, when opening the project a pop up appears listing the interactivies to update. When the button Update has been clicked the project is being updated and saved followed by the reload of the page.
If deny the update of the project, a tiny yellow icon with an exclamation mark will appear next to the outdated element ─both in the Timeline and in the Interactivities panel. To update an element, drop down the Interactions section in the Library and click on the element with the yellow icon. The information will load on the Info panel, along with a yellow button named "Update project". Click on the button and the element will update immediately to the most recent version.