When is the data updated?
Data is updated in several cases.
The main update is the one set in the update schedule. It initiates a download of all imports from the sources indicated, which are then transferred to Inkspace, where exports are generated. This doesn't require any interaction on the user's part, everything is done automatically. The update is also forced when the url of the data source file has been changed. However, this requires that you accept the changes by clicking "Adjust changes". You can also wait for the scheduled update, which will accept these changes automatically.
Changing the mapping in the import will also force the update process, but it will not initiate another download of the data source in the selected import.
Each of these situations initiates an Inkspace update as well as an update of all exports.