Should be on same page as other option.
Make sure you're saving the configs with enough of a difference in the names.
This is the template I use to save mine.
${NodeGroup}\${Caption}\${YYYY}-${MM}-${DD}\${YYYY}-${MM}-${DD}_${HH}:${NN}:${SS}${AMPM}_${Caption}_${ConfigType}.Config
This way it goes all the way down to the seconds. So, as long as I do not save the config 2x during the same second, I will have unique files for every save.