Never mind. I had not installed PMODE Jumper J4. That brings up the bootloader.
I've not tried loading anything yet, but I suspect this will fix it.
Can you please program the RAM once now and check if you face the same issue?
Also, was the PMODE Jumper J4 not present on the board when you were trying the "Cypress FX3 USB StreamerExample Device"?
Yes, the problem was that I forgot the PMODE jumper.
No PMODE jumper -> Explorer board runs whatever is in EEPROM.
PMODE jumper -> Bootloader mode.
And I have successfully downloaded to RAM and have run code.
This problem is solved. When I stop being an idiot.