troubles after uboot configure

[Boštjan Jerko]

Hello!

I've decided to install Debian on my Freerunner and followed the  
procedure.
The installation went ok, but when I wanted to use script to configure  
uboot I forgot to install dfu_tools.

I've installed dfu_tools and started the configure_uboot.sh again but  
now my Freerunner starts white screen and restarts.

How can I change uboot back to previous setting?

Boštjan