[Pinkie]

Suddenly Calibre Companion on my Kindle Fire won't connect to my computer wirelessly.
When I plug it into the computer, Calibre can see the Companion on the Fire, but wireless connection isn't working.
I've installed Google Play on my Kindle Fire, and downloaded Moon Reader, which I prefer to the native reader.
The Fire has been working without a hitch until today, CC connecting wirelessly to Calibre on my computer. But now I can't connect wirelessly or using the Content Server. Companion just can't see my computer. I've tried putting in the IP address and port, but that doesn't work either. I've tried it with my firewalls down, even though the firewall is reporting that it has seen the Calibre connection and allowed it. I closed it anyway. No go.
I've restarted both devices, updated everything and it still won't work.
Since I've not changed anything, I'm baffled.