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As described in this thread, the new version of dropbox backup is great but has a major downside: files stored via backups can no longer be accessed within the dropbox app! Quoting @mbriney from ...
Even the Dropbox Marketing Team knows that access to backups is a good idea!
1) They advertise that feature in pre-sales for upgrades.
2) Once you upgrade and install on Windows, they send you "helpful" links to tell you how to use the App to access Backups. But the App doesn't even include a link to click to the backups in a browser.
Dropbox Backup welcome email directs users to the App