Thanks everyone for the assistance and links!
Our Costco Trax 42 DIY programming finds so far.
Noah Wireless - Would not wireless connect to the aids using any of the Connex 6, Connex 8, or Connex 9 (not that we expected it to with any of the newer versions)
Noahlink - Would not connect to the aids wireless using any of the Connexx 6, Connexx 8, or Connex 9
Success - Noahlink , using wired connectors and battery adapters, and 8.5R ( CX8515r8511 ) .
Once connected, they showed up as TRAX 42 units, and Changed the default to “download” from the aids to save the initial file. Now My dad can start his DIY learning and adjusting in an attempt to improve his programming, without having to go try and get into a store constantly to do so.
I will try and update more as/if we can find time to try and connect other methods and software.
Thanks again, and good luck to everyone!