I tried the free version prior to buying the full version so I could make sure it works. It is not working.
1) The backup seems to hang up on "Creating file backup zips (Plugins)" and seems to be in a neverending loop of "increasing resumption interval".
2) "Existing Backups" tab has a backup which says "Not finished" and (No database).
3) I can not find no reason for the - what seems to be - failure of the backup.
4) I am using WestHost as my host and DropBox as the cloud storage - if that makes any difference.
5) I got no email update when the other backup failed(?).