You need to purchase a DS708 update if the free 1year update period is over. If you don't want to pay,  Do not allow expired update period DS708 to connect to your WIFI and especially Autel's server.  Retrieve the serial number and the "register password"  by clicking  "Set up" , then clicking "About" and writing it down. You need to contact support and check update status if expired , if you want to pay to update , let them know you plan to  re register the used unit to your name and email address, after that is done and the update period is not expired  . Install the DS708 software suite CD on a clean windows PC and do the updates from the PC program one make at a time . I would immediately back up and copy the old software of the existing SD card  to your PC . Get a brand new 16gb SD card formatted in FAT32 and put it in the card reader and copy the back up software to it and save the old working SD card as backup just in case the newer software versions have issues .

  It shame for the device to become unusable once the subscription period has expired.