@ben-noble, you might be missing the fact that when you install the TRIGGERcmd agent, you'll get a new icon in your "tray" in the lower right corner of your screen. You can right-click that to find the GUI Command Editor where you can add and remove commands. I'm assuming you're using Windows?
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When you add commands, they should show up in your account under your computer at www.triggercmd.com.
Please let me know if you got that far.