Update Pre-Selected into Model tool in the Updaters drop-down helps update pre-selected family files if any by the Explorer into the current model if applicable.
After the button is clicked, it pops up a dialog for confirmation for those pre-selected family files.
After the OK button is clicked, those family files will be updated into the current model one by one, in case it is already loaded. A progress bar will show how many files in total, which file is currently being processed, and what remaining time may be. An information box will finally show what have happened, good or bad, e.g. the family has not been loaded (no component found)!