[Snapshot Pro] Snapshot Pro not uploading to Dropbox


I've authenticated Dropbox on a few sites, and select it as a destination, set a folder, but I don't see any uploads in the "Apps/WPMU DEV Snapshot" folder. I made a few Snapshots in the last few days, very small websites under 300MB. Plenty of space on Dropbox. Anything I can check?

Thank you!