Okay, try this one.

Since there was no attachment, I assume you mean v366 at the web site. Grabbed it, tried it.

Good= I don't get the "failed to set up serial port" error.

Bad= GPS doesn't work.

If it's in the home sled (no GPS attached) and I use force-DC mode to make GPSapp available, the GPSapp program locks up with a black screen when I invoke it.

If it's in the car sled (GPS actually attached), it sits there at "Waiting for data from GPS receiver" but never gets past it.

I will concede that it's possible my GPS unit failed sometime between yesterday (last time I used GPSapp) and today, but I'm betting it's not a likely enough possibility that warrants me putting an older hijack back into place and doing another run out to the car again.