I am using the SunSDR2 Dx with EESDR3 V 11 and operating remote without issue.
In fact, I'm using it right now on the 80m band.
The Transmit function is not available but operating the receiver remote is a real pleasure.
Once the Starter Pgm is setup and saved, just have the SDR turned on, do not have the ESDR3 program operating, just the Starter Pgm, which once started, will come up and state "Connect Successful".
On your remote PC Registration for the Client is set up, click on it and log in.
The next window will show the radio Logging In and showing your device.
Click on CONNECT and you will see a window showing Connection Successful, and a GO button to select.
I'm waiting for the final release of SDR3, not another Alpha version.
I wonder what the release time frame that we can expect?
GL Tom W3FRG