Installing tRio is a 2 part process. Firstly, extracting the new receiver.arf file from riot-0.x.x.zip, and replacing the existing receiver.arf file in the original ARM directory.
The second part involves downloading trio-0.x.x.zip, and installing the files it contains in a new directory, typically “c:\Program Files\tRio-0.x.x”.
Then make the changes to "trio.xml" and "trio.bat" as detailed under "Edit config files" in the Install documentation. Lastly, make sure you have a Receiver switched on (and not timed out) and run trio.bat.

Et voila!

Mark