On the Tools menu, click BuildRoot Options.
This option creates a backup of your project settings each time a build is completed. This file will be located in the ERROR_FILES subdirectory (or one of the dated subfolders if error file archiving is turned on) in your project directory. The file will be called <Project Name>_<date>_<time>.nod. It will be updated with each build when project settings or options have changed.
Default: on