Hey I need help on my f700bt... i had the 2.000000 software on my unit. I uplated it to the 4.00000 and it works fine but my maps does not show... it just has the base map on the list.. I have tried to add more maps manually but no luck it's in the right folder but does not show when I rest the unit.. NEED HELP in what I need to do to get my maps back the correct steps.

http://avic411.com/index.php?/topic/39650-f700bt-f710bt-f900bt-f70bt-f90bt-2014-q1-eu-maps/page-11

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I got them added but when I try to open one or even the base map that's installed it says there is no application to open file... and it justill shows a blank screen on my unit.. the base map shows nothung. I'm trying to using Garmin maps it might not support it .. I have the 4.000000 software but I didn't back up myour unit before I updated it.. smh can u help or let me know what I need to do.. thanks if really appreciate.