Auto connect on Power up

I have a hopefully simple question.
I have written and flashed an App to my Argon and it appears to work as desired.

Upon power cycling or immediately after the flash, the device comes up in Listening Mode (flashing Blue). I am forced to Press the Mode button for 3 seconds to get the device connected each time I power up the Argon. (I am powering over my own 5V supply if that matters.)

What do I do to get the device to automatically connect instead of having to press the mode button?

I see a related topic titled, ‘After flashing argon device goes into Listening Mode’. The answer there was to use CLI to ‘particle usb setup-done’. However, I have been using Web IDE. What should I do post Flash to solve?