If you have a previous BSP and NBOOT that works with AtlasMgr, follow the below step to upgrade to the latest AtlasMgr 5.0 and NBOOT:

1. Use old AtlasMgr update the new NBOOT.BIN
2. Reset the board, and in the new NBOOT.BIN, select function 4 to erase NandFlash
3. Connect the board with PC in USB, reset the board and hit the "Open" in AtlasMgr 5.0 with 5 seconds of boots.
4. Update the new EBOOT.BIN to your board.
5. Work with your new NBOOT and EBOOT to download image. Now the NBOOT and EBOOT could output either through serial or usb. You 
   can choose your boot loader menu in either HyperTerminal or the AtlasMgr USB terminal.