Steve,
It is a new file, but it only adds support for the ULPower can bus.
If I had a custom sensor, I personally would never update using method 1. I would just use the software update only file. The sensor file rarely changes and even if it did, unless you change something on the airplane, there really is no need to update the sensor file.
I have a case going with engineering to add the Aithre sensors, so at some point, hopefully they will include them.
https://dynonavionics.com/whats-new-skyview-sensor.php