Snapshot Pro: Delete Pending Dropbox Backups

Dear wpmu dev team,

Is there a possibility to delete pending Dropbox backups? Please see here:

https://www.dropbox.com/s/sj4ynth2q8hyuwn/Screen%20Shot%202016-08-31%20at%2009.41.39.png?dl=0?dl=1

It seems to me that once the transmission to Dropbox failed Snapshot is queuing more and more pending transmissions which then fail altogether.

Is there also a possibility to transfer bigger backups to Dropbox in a reliable way?

Thank you,
Bogdan