When the Manual option has been selected you will be able to select one of the Fling options from the file's right click context menu "Fling->Download", "Fling->Upload" or "Fling->Delete". To do this go to the folder and right-click the file and in the context menu select one of the Fling options to perform either an upload, download or delete.
Automatic (transfer files whenever a change is detected)
When the Automatic option is selected whenever any file changes with in the local folder that files will be transferred to the remote folder.
Scan for Changes at a Preset Interval
When the Scan option is selected Fling will regularly scan the folder for any changes and transfer any changed or new files.
Check Interval in Minutes:
This is the number of minutes between scans when the Scan mode has been selected.
Scan Folder on Demand (click Scan to transfer all new changes)
When the Scan on Demand option has been selected Fling will scan folder of any changes whenever the Scan toolbar button has been clicked.