Questions to update the Bootloader and difference between SCZ and ECZ software

Hello,

I have two questions.

1  how can I update the Bootloader from Jul 3 2013 to the Bootloader from Nov 1 2013 when the SBC runs the Version 7.2?

    I found no directory ramdrv like descript in the documentation (5. Type: cd / ramdrv) with winscp?

    How did the SBC have the version 7.2?

2  What is the difference between SCZ and ECZ software, can I change the software from SCZ to ECZ without any changes to the SBC configuration?

Thanks,

wolfgang