I can confirm both issues that you describe (except the versions are 1.11 / 1.13, not 1.1/1.3).
I created a ticket in our bug tracking system, so we can schedule fixing these problems.
Meanwhile you can use the bootloader menu, and enter the command clear mac through the serial port in order to clear this configuration.
How urgent do you need a fix for the ConfigBlockEditor?
I have corrupted 2 systems with update.exe /u onfigblock,raw,backup.cfg. One is open and I have access to serial port and I cleared MAC already, but for the other I have to loosen some screws.
The reason for updating with backup.cfg was to solve the problem with backlight off during splash screen. So one problem follows the next…
Anyway, it is not too urgent because it is only one system left that I have to clear MAC.