Thanks, mgworek! That did the trick.
I have been super happy with this docker (and Emby), normally the regular updates don't really impact me much but I noticed a few points about library updates changes that I was hoping to see a few weeks ago.
The way I forced the update was to "edit" the docker, keep all the settings as is and click "Save". It pulled down the latest and was up and running right away. Now I am running Version 3.0.6200.0 (even newer than when I posted this question the other day).
Thanks again everyone!