The sensor will not appear in the drop down list. These are 3rd party so I don't get to add them to that list. Did you look at the video about installing the drivers? It's on the main page: [LINK
After that, you should take a look at some of the examples I've created that come with the driver suite. The ones that are relevant to you are the ones starting with HTIRS2-test*.
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| ROBOTC 3rd Party Driver Suite: [Project Page