Thank you.
This does not look good.
In the receiver connection is probably not correct.
The SBUS cable must be connected in the SBUS port.
For some reason SBUS adapter cable is connected perpendicular in the receiver.
Maybe it is some different version?
UPDATE: Yes, probably it is a different version.
Were you ever able to connect to the unit through the software? If no, then I think that the problem will be rather in the USB interface driver.
But this is not dependent on the receiver connection at all. So if it worked with PWM, it should work with SBUS too.
If it worked with PWM, then you can do this:
Connect BEC cable to the unit directly (for example at AUX port).
Then start the software and do not enter setup wizard. Then in the General tab, you can simply change receiver type to Futaba SBUS. Save the settings (by CTRL+S or in the Backup tab).
Then reconnect the cables back as it is now and I think it will work.
Probably it does not work now because receiver is sending wrong data to the unit while it is still configured to PWM.