I upgraded my 450 (zyx-s) and had to take it out and try. The hover and flight characteristics seemed to be better, but It was getting dark, and I almost put her in because My eyes aren't to good at night.
I Then tried to upgrade the 550(ZYX) and I could not get a connect. I had to power the PC down and restart it. it hung up on power down and I had to hard stop it.
After the restart everything worked and the upgrade went smoothly.
I cant wait to test when I can see.