hi! i bought Maxidas 708 about 1 year and 6 month ago. works well . but after 6 month of purchasing it require username and password for updating. the main problem is that my sd card was broken and i made a backup of sd card on my computer . when i restored it on new SD car with same specefication it show me updating error but work well.i.e no change in performance .so can anyone helps me to update my software . i tried to register it using online but it need product number , serial number and password . i could not find it on my maxidas 708 after replacing SD card.