Just got this this email from Seattle Avionics which was doing the upgrades for Navworx:

Effective immediately. Dallas Avionics, Inc. has discontinued distribution and support for all NavWorx products.

All pre-orders for NavWorx products, repairs and upgrades received by Dallas Avionics, Inc. will be canceled effective immediately.

Over the past year, Dallas Avionics, Inc. has made every attempt to facilitate the success of NavWorx and support of their customers. Unfortunately, under the current conditions and outlook, we can no longer continue to provide this service.

While we are compassionate to your situation, please direct all further correspondence direct to NavWorx at:

NavWorx, Incorporated
3706 Big A Road
Rowlett, TX 75089
1-888-NAVWORX(628-9679)

Also, if you go to the Navworx site, it says they have ceased operations.