Why does the Dropbox uploader only let me select one file at a time?

The Dropbox uploader does let you select as many files as you want — there's a select-all checkbox at the very top left of the folder that selects every photo in one click.

How to select all files at once

• Open the Dropbox folder picker in AutoHDR
• Click the checkbox in the very top left of the folder view
• This selects every photo in the folder — no need to click them individually