Intel NUC Bios and BootGuard


after changing something in Bios of my new Intel NUC i get only a black screen. Therefore i have make a backup with a CH341A Programmer and open it with UefiTool. I want replace the NVRAM Settings with the standard settings but i seems not to be replace something because of BootGuard, Rebuild, Insert, Replace all is greyed out.

Is there another way/tool to reset the NVRAM-Part?


@obluer - Use regular UEFITool versions 25-28, not Alpha NE versions 51+