jks

Okay, I just did this on a Ubuntu 17.10 distro and it seemed to work:

sudo apt install python
python --version (confirms python 2.7, not 3.x, was installed)
sudo apt install python-numpy
sudo apt install git
git clone https://github.com/jks-prv/kiwiclient.git
cd kiwiclient
make help
(kiwirecorder.py help will print)
ping kiwi-ip-address (make sure Ubuntu can see your Kiwi)
^C (to stop ping)
export KIWI_HOST=kiwi-ip-address (for Bash, different for other shells)
make real (record a real mode [i.e. non-IQ] file)
^C (to stop recording)
ls -lt (recorded .wav file should be at top of list)

Look at the "Makefile" file to see examples of how kiwirecorder.py is invoked to do different things.

I looked at your Kiwi. The transverter was inline so I couldn't evaluate HF. But even that looked much worse than before. Lots of small carriers everywhere.

I fixed the config.js file so it says "Air Band" now instead of "Amateur".

Also the software update to v1.282 was perfectly fine.

From the CHANGE_LOG file:

v1.281  April 12, 2019
    Add URL parameter "peak" to set spectrum peak hold mode (overrides last value saved in cookie)
        e.g. "&peak", or redundantly "&peak=1", but more usefully "&peak=0"

    Audio FFT:
        Allow URL parameter "no_wf" to be used in 4 and 3-channel modes, not just 8-channel mode.
            This is useful e.g. if you want to use the audio FFT to study the frequency response of
            the new de-emphasis filter in 20 kHz mode (3-channel mode) where you would otherwise
            never be given the audio FFT because there is no shortage of waterfall channels.
        Added missing window function to FFT.
        Fixed scale/waterfall click frequency in non-IQ modes.

    Added signal generator extension. When enabled replaces ADC input to audio/waterfall DDCs
        with a tunable RF signal source using the same FPGA DDS IP block used by the DDC mixers.

        WARNING: Be careful about drawing conclusions re Kiwi performance and possible bugs
        when using the sig gen. It reveals spurious responses in the waterfall/spectrum to a greater
        degree than if you just tune around with an antenna connected. But without detailed
        experimentation it can be difficult to know where the limitations are. Remember that the
        Kiwi is a carefully balanced compromise to get 4-channel mode to work (i.e. fit in the FPGA
        and have enough Beagle CPU cycles). So the DDSs, mixers, DDCs and FFTs are not perfect.
        Speaking of compromise, when considering FFTs it's important to understand this:
        https://en.wikipedia.org/wiki/Spectral_leakage

From the CHANGE_LOG file:

v1.281  April 12, 2019
    Add URL parameter "peak" to set spectrum peak hold mode (overrides last value saved in cookie)
        e.g. "&peak", or redundantly "&peak=1", but more usefully "&peak=0"

    Audio FFT:
        Allow URL parameter "no_wf" to be used in 4 and 3-channel modes, not just 8-channel mode.
            This is useful e.g. if you want to use the audio FFT to study the frequency response of
            the new de-emphasis filter in 20 kHz mode (3-channel mode) where you would otherwise
            never be given the audio FFT because there is no shortage of waterfall channels.
        Added missing window function to FFT.
        Fixed scale/waterfall click frequency in non-IQ modes.

    Added signal generator extension. When enabled replaces ADC input to audio/waterfall DDCs
        with a tunable RF signal source using the same FPGA DDS IP block used by the DDC mixers.

        WARNING: Be careful about drawing conclusions re Kiwi performance and possible bugs
        when using the sig gen. It reveals spurious responses in the waterfall/spectrum to a greater
        degree than if you just tune around with an antenna connected. But without detailed
        experimentation it can be difficult to know where the limitations are. Remember that the
        Kiwi is a carefully balanced compromise to get 4-channel mode to work (i.e. fit in the FPGA
        and have enough Beagle CPU cycles). So the DDSs, mixers, DDCs and FFTs are not perfect.
        Speaking of compromise, when considering FFTs it's important to understand this:
        https://en.wikipedia.org/wiki/Spectral_leakage

Jim, let me know if you get kiwi_nc working. I got it running to the point of producing output but haven't tested it beyond that.

For Mac people, I just found this work by Chris yesterday: https://www.blackcatsystems.com/software/kiwiSdr-sound-client-virtual-audio-device.html