HPM = Hubitat Package Manager, which is a very helpful tool to download & manage (many but not all) community drivers & apps.
The instructions that came with each of your switches covers how to download the corresponding drivers and set up your switches - have you looked through those instructions? Here's the HTML version of the instructions that comes with the Blue 2-in-1.
The driver link in those instructions goes straight to Inovelli's GitHub page for the driver code, and that works perfectly well -- if you want to later do a match-up in HPM to help keep the driver updated over time, you can always do that later.
