As Caty says, use BaseCamp/Mapinstall to generate new .img to be on the safe side. this [Only registered and activated users can see links. ] excellent tool gives a larger window so that you can see what to select much better.
MapSource is in my opinion much better (easier to handle, faster, smaller, more intuitive) for viewing maps and making routes and also for sending the routes to the gps. Never had any problem with that.