Same problem.
I was getting ready to rip my hair out.
All the searches I did said it was a Driver issue with the cable.
Pretty sure that was NOT it.
Some other stuff I found said cable might not be seated correctly....After messing around with that. That also seemed unlikely.
Go to Radioddity download the Software/CPS for GA-510.
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First one I tried was the new one and it worked.
Software is a ***** to use but whatever.