For those that were wondering why the 165 was still at version 19.18 I think this might help answer your question - www.notebookcheck.net/Garmin-brings-over-a-dozen-improvements-to-popular-mid-range-smartwatch-with-new-update.894340.0.html
Also, I was able to update my 165 to Software Version 20.30 today. When I connected my watch to the Garmin Express on my pc it told me there was an update.