Well - I'm glad i did? try the tinysa Ultra :-)
I upgraded the fw to the latest 1.4-82 (named 1.4-77) , and cleared config , set the clock , calibrated the touch sreen , and gave selftest a spin (PASSED)
I tried the "APP" under Wine in linux , and it's actually working fine (I think)
I did have to install "Wine 8" on my inux-mint 21.1 (a bit reluctantly) , but the app seems to be running fine..

I did waste most of 1h, as i started the : tinySA.exe
And that didn't behave very well .....
I had the idea that the "small .exe" was the launcher for the lager .exe ....
But after i tried the tinySA-APP.exe , i was met with the above screen.
The tinysa is "dancing" a little around /dev/ttyACM0 & /dev/ttyACM1 , but i can see the mapping in the syslog , or else i can prob lock to /dev/tinysa01 via an udev script & the serial.
I have a set of? - 3 x 2 SMA attenuators on the way - 10,20,30 dB weinschel 18GHZ.
Now to calibrate the frequency offset against my counter & gpsdo
Thank you to Erik & all who helped out ...
Carsten
Ps: I attached a "Wine registry extract" of my COMxx to /dev/ttyxxx mapping.