I had the exact same issue and then decided that I would try the whole flash and install process one more time.
When I did this I noticed that there was a discrepancy between my Image Tool setting and this graphic:
When I used the Browse buttons to make sure that the right paths were being installed into the right addresses I got the following result:
IMG1 image is being sent…
IMG1 image has been sent successfully!
IMG3 image is being sent…
IMG3 image has been sent successfully!
IMG4 image is being sent…
IMG4 image has been sent successfully!
All images are sent successfully!
COM3 is closed successfully!
I was then able to run the Scanning Wi-Fi Network Example Code and the Connecting To A Specified Network Example Code successfully.