Hubitat Package Manager (HPM) is a custom App itself which makes it easier to find and load custom apps and drivers. Perhaps it might be worth explaining one or two things before directing you to installing HPM....
When people talk about "installing" a custom app and/or driver, there are in fact two steps involved. The first is to save the app or driver code onto the HE hub. This traditionally involved copying and pasting text into a new entry in the Apps Code or Drivers Code section of the HE UI. You would normally navigate to the developers GitHub Repository, copy the text from there, then paste it into a page on the HE hub. HPM has made this first step easier and more convenient by providing a way for users to find and download apps and drivers in an app on their HE hub. At this point the app or driver is not "installed", or at least I wouldn't refer to it in that way, I would say it's "loaded", though I cannot remember how HPM describes it. The app or driver is not running or performing any actions on the HE hub, it is just available to be installed.
The second step then remains the same, installing the app or creating a device using a custom driver. This is the step you were attempting to do. If you have previously loaded an app, either by copying and pasting the code manually, or through HPM, the app will be available to be installed from that part of the HE UI where you looked earlier.
So, the things you need to do are:
- Install Hubitat Package Manager - See here for details on installing HPM
- Once HPM is installed, locate Tile Builder in HPM and load / install it
