Is there a software application for the 8714ES to calculate K factor?

Is there a software application for the 8714ES to calculate K factor?

Google could be your friend. I did a search on "stability factor touchstone file", and see

http://www.utdallas.edu/~frensley/courses/EE4368/RFAssistant.html

and

How to calculate stability using Touchstone file?

I'm sure you will find plenty of others. So just read out the S-parameters, save as a Touchstone file, and you are done.

You could ask John Miles if there's any chance of him adding it to his vna.exe program

I expect that can read from an 8714ES.

Of course, there are other approaches, like read into programs like ADS, but that's rather a sledgehammer to crack a walnut.

No, there is not a software application to calculate K factor for the 8714ES.