Software is available at http://navmanunlocked.wikispaces.com/Unlock
Scroll down to find "Navman_N40i_Unlock"
I did mine 2 years ago and want to update maps but most maps exceed 2 gb which is the limit the N40i device can read.
Also I do not remember what version of iGo I used. You will find the device is not listed.
If you figure it out, I would love to know what you used.