Yes, unfortunately I have had the same experience that primalucelab does not respond to support requests. Very sad for such a company.

I have now been able to downgrade the firmware to version 1.3 and it looks like it will work again with indi.

I had to download the FOCUSER Manager and the ESATTO firmware 1.3. at the bottom of the page. This allows me to downgrade the firmware.
eu.primalucelab.com/info/downloads.html

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