Command line syntax:
1) Incremental backup
"C:\Program Files\DFIncBackup Pro\DFIncBackup.exe" /Prj=Project Name;INC
2) Full backup
"C:\Program Files\DFIncBackup Pro\DFIncBackup.exe" /Prj=Project Name;FULL
You can generate a command line by feature
"Quick Shortcuts for manual backup".
Use menu "Project | Create Shortcut".