Hello! I have a similar problem with Blaupunkt New York 835 (world). Unfortunately, i think i bought the unit with a cracked iGo software. Tried everything I have read here, still not working. It is strange that the folder structure on my so called "original" microSD is different, i have a "RTNavi" folder which is empty and a "mobilenavigator" folder which contains the actual software.
I will be grateful for any advice.