I just keep my KeePass file in my DropBox directory. DropBox automatically keeps it synced. I use KeePassDroid and DropBoxSync on my phone and tablet. When I save the file in any of these locations, it updates everywhere. What does having a separate app do to make this more simple than it already is?
Exactly, what you are doing works and does not need this plugin. This plugin is for people who don't have a mounted drive /folder locally that syncs. This plugin allows using S3, or SFTP, or digitalbucket with no additional requirements other than this plugin.
Since you brought up digitalbucket, the unpaid version still doesn't work, correct?