looking for backup file or temp file

hello - we are new to solidworks here at my company &today i inadvertantly saved over a part that i needed while makingan opposite hand of that part - i was told by our solidworks peoplehere that there is no bak file or temp file like in autocad & itried to look for one but it was not there - is this really true??
any info or help would be greatly appreciated - i know it was mymistake but i would think there would be a file to return to so asto pick up from the last saved part - thank youSolidworksGeneral