We have recently updated our TerraMiner User Guide, along with the most recent firmware.
They are both available for download here:
http://cointerra.com/user-guide/ .
We appreciate any feedback on the user guide, so feel free to email
techsupport@cointerra.com with any suggestions.
Thank you all for your continued support.
Team CoinTerra
ah - you used my arp trick

try turning it off and on then going to your PC and typing 'arp -a' to list IP addresses your PC has seen - and it might be there.
Will