Hey dude... I had the same problem as you and now I got the update to work. The first time around, I thought I followed the directions but realized that I misunderstood them a little bit.
In step 11, I deleted everything inside the My Flash Disk Drive. Then I went to the SD card... Opened the My Flash Disk folder... Selected All from Edit, then copied the contents. I went back to the My Flash Disk Drive and pasted the contents there.
My mistake on the first attempt was that I copied the actual folder and just pasted the folder into the My Flash Disk Drive. I hope you try this an