Since February 2010 - the date when the first public vna/J version appears - many things have happened.
I think 11 years is a hell of a long time - so I will suspend development and any support of vna/J until further notice.
Thanks for all the active users von vna/J - stay safe!
Remark 1: I do not longer provide any help regarding FW upgrade and related problem to this issue. I'm not mRS!
Remark 2: You can find the complete source-code for vna/J on Github.
//Dietmar, DL2SBA