Thanks but unfortunately it's still not working.
Here's exactly what I tried:
Downloaded tfar from provided link, extracted @task force radio, put it in my arma 3 directory like I would do with any other mod.
Opened tfar folder, opened the teamspeak folder included and double clicked on the plugin as you suggested.
It asked me what I wanted to run it with, searched for ts3client_win64 (not the shortcut) and all it did was opened teamspeak - it did not ask me if I wanted to install it.
Checked tools>options>plugins still no tfar.
I then tried to drop the plugin file into the ts folder and did the same thing as above but it did not work.
I am not using the outdated stuff, this is all coming straight from the message I received to update ts and mods.