Thank you @ninjatill, that's what I figured and this morning I've got everthing up and running again 
Now on to more productive things.
@kennethlimcp, The Argon wasn't bricked, just confused. I was using it as the assisting device to bring a problematic Xenon back online. Everything went sideways when I entered the mesh password, all of a sudden none of my other devices could get to the cloud anymore, the Argon had somehow been kicked off the mesh network. The Argon itself had no problem connecting to the cloud, breathing cyan. Everyone else was rapid flashing green with intermittent yellow/orange.
After 30 minutes to an hour of that I tried to run setup on the Argon again and ran into the existing network problem.
This morning I created a new network on the Argon and then moved the Xenons over one by one with the setup app. Interesting and disconcertingly none of the moved Xenons could connect to the cloud until I moved the last Xenon over to the new network. They were all rapid flashing cyan with intermittent red. Once the last one got moved all the Xenons suddenly started breathing cyan. I suspect some sort of mesh conflict in the cloud until the old mesh got removed when no devices were associated with it anymore, at least that's my SWAG (Scientific Wild Ass Guess). 
Anyway, all is well now and I'm back to being a happy camper.....or should that be a meshy camper 
PS @kennethlimcp, I just read this post
and I was running a simple heartbeat loop on the Argon at the time. Heres the bits I inserted into Tinker just in case that makes a difference.
unsigned long heartbeatTimer = millis();
uint32_t heartbeatCounter = 0;
bool ledState = FALSE;
char pub[20];
void setup()
{
//Setup the Tinker application here
pinMode(D7, OUTPUT);
digitalWrite(D7, HIGH);
}
/* This function loops forever --------------------------------------------*/
void loop()
{
if (millis() - heartbeatTimer >= 1000) {
ledState = !ledState;
digitalWrite(D7, ledState);
heartbeatCounter++;
snprintf (pub, sizeof pub, "%lu", heartbeatCounter);
Mesh.publish("BunnyHop", pub);
heartbeatTimer = millis();
}
//This will run in a loop
}