Yes they do.
They come up rarely these days here on WTers, but there was one last year sometime.
If you don't already have the software, unless you can access the CD, you'll have to get it from Dynojet by means of them directly linking to your computer and installing it for you remotely.
There's more IIIusb ones kicking around, and that software is still downloadable off the Dynojet website if one doesn't have the CD. The IIIusb will go for more $$ than the serial port PC3.