It is recommended that all BRE users backup their bre.ini files regularly. You should take a backup of it right after you’ve set up the Server Farm configuration, keep it safe and use it if / when you need to.
If you already have a server farm setup, then take backups monthly and ensure to date them. If / when you need to restore from a backup, choose a file from a time that you know BRE was working well (for more information, see our article BRE.ini - How to restore for a backup).
It should be located here:C:\Users\<username>\AppData\Roaming\Lavastorm\LAE6.1. However, sometimes bre.ini canbe found under the <installdir>, (e.g. Program Files).
If you cannot find it you may need to instruct your computer to show hidden files. Details of how to do that are here: https://support.microsoft.com/en-ie/help/14201/windows-show-hidden-files
STEPS TO CREATE A BACKUP:
Once you have located it:
> right click on it
> select “copy”
> paste it into a location of your choosing