Not to be ungrateful...
 

But I already have a free app that backs up my HD - SilverKeeper. Trouble is it doesn't seem to do incremental backups any more (it mis-reports the size of my source disk's files) so I wanted to see if yours worked better. Unfortunately there is no way to try out the incremental backup part without buying. Couldn't you provide some kind of time-limited evaluation of the full app in v.2.1?

Drop me some email and I'll be happy to provide you with a time-limited key.