Finally got it to work. Connected Spark to RC, fired up DJI GO4, connected Spark to PC. Fired up NLD and WOW! Took a minute to install the NFZ patch. Test flew at the edge of and NFZ. It works!!
Had the same issue as Rana posted, slight delay with the download... but IT WORKED :) First try after patch I was prompted to unlock NFZ, tried it and it froze during unlocking. Turned off the spark and fired it up again and BINGO, I can fly.