It looks like those drivers haven't been updated in a while. 7.1. That's before my time... They uses the IVI standard, which is fine, but it will require you to install the IVI driver as seen in the readme.... In my opinion that's about 1 step away from abandon-ware unless they give you some installation examples.
The IVI requirement really drives your options here, you'll need to set up a driver session and go through that process under Max. I am not of fan of IVI, and it's not because of lack of experience. Once you get your IVI driver installed for the Thermotron you'll see it listed in the driver sessions under MAX. Then you'll create a logical name for your device and connect it to the driver with the physical connection information (IP address).
Honestly this is a LOT of work to just get a temperature update. See if you can get away with the basic GPIB route and avoid using that driver. I think that will be way easier.
Cheers,
Tim