Could you please provide the switch model and Netsight version.
I've just finished preparing a customer demo with 5x X450 and it took me a minute with the archive wizard to create a scheduled daily backup job with the default settings in the script.
The backup file that was created on the Netsight server is a .zip which includes the .xsf and .cfg version.
To view the file I just right click in the archive and select "View Configuration File".