Spent literally hours downloading Sygic Sweden maps through the headunit, only for it to again tell me there were no maps installed, and again, and again.
Gave up and re-installed IGO.
Gino. I got my maps from this ebayer.
https://www.ebay.co.uk/itm/323699157681?ul_noapp=true Cheap, and helpful, answered many questions as I had trouble installing from the SD card to the unit's flash memory.
Not only did I get Sygic, but IGO Worldwide, and Navigon was also included on the supplied SD Card for the same £10 price, not a bad deal.
Regards