I just reinstalled the latest PulseView. With/without my FX2LP plugged in it crashes on startup.
I had had a problem with the Intel Bluetooth adapter on my motherboard and had just updated the AMD drivers for my Asus X570. That includes the Aura LED controller. (Actually, I may have never used PulseView on this iteration of my PC?)
In any case, the Aura USB hardware has two USB interfaces, Interface #0 & Interface #2!
Interface numbers must be consecutive. This breaks some USB enumeration libraries. The fix is to manually select your interface:
C:\>pulseview.exe -D