Please download and install the latest version of StreamFab at https://www.dvdfab.cn/download.htm?trackid=headmenu2,headmenu2,start up StreamFab and get into the main interface of StreamFab, click on Menu button(☴) at the top-right corner of StreamFab screen. Find "Authorize" to enter your registered email and its password at StreamFab Member Center to activate/authorize StreamFab on the computer.