IF you do not need the security features in Smartware there is a viable continuous backup alternative that performs all the backup functions without being a resource hog (ie. no more WDFME running all the time at 50+% of cpu). It is simple to use and can do catagory and/or (mix) file backups. It is FREE! There are more advanced versions that can include system and catastrophy type backups and add some functionality not included in the free edition.
I’ve been using it for 2 days now. It apparently does not constantly scan your system but keeps an index of modified files that need backing up. It does the backup automatically on an hourly basis (free edition) but you can force it a any time.