Ok, Thanks aren't allowed, so I'm gonna pat Catymag, lolypop000 and Neil on the back and ruffle your hair. Managed to get Voice Command working by simply selecting a few language options on Garmin Express and downloading+Installing. Seems to have fixed the problem. Hitting Voice Command app brings up the Voice Command options screen. I wouldn't have been able to work the file associations/dependencies as explained by Neil for quite some time, so that was a great heads up Neil.

I'm seeing G2S files for 37xx in the posts but is G2S applicable to 3490? - There's nothing in 3490's GarminDevice.xml.

What is the 'ExtData' folder for?

TIA