Migrate Backup Exec 2012 to another Server

Hi All,

Can anyone clear something up for me?  In TECH129826 it explains when migrating Backup Exec to another server with a different Windows OS version, with the DATA folder, "copy all BEX files to the Backup Exec\data folder (only BEX files)."  What are BEX files or what aren't BEX files?  I see xml files with BEX in their name, security certificate files, db3, dat and bak files.  

tnx....