Thanks Mario and Dan. I've tried and checked everything you've suggested but the problem remains.
I also emailed PG Music "support" but as usual I got no response. I also got no response from Native Instruments and ProjectSam.
Mike Garry
BIAB/RealBand 2019(4) UltraPlusPak, Kontakt 5, Kontakt 6 Player, EZmix, Hybrid 3, Audacity, Acer Predator, Windows 10, 64bit, 16GB ram, CPU: Intel i7.