Open the Online Backup main application by double-clicking the System Tray Icon (located in the lower right of your desktop) or from the Start button, choose All Programs, Online Backup, and then Online Backup.
A check mark in a white box indicates that all the contents of the folder are selected for backup.
A check mark in a gray box indicates that only some of the contents of the folder are selected for backup.
Note: The Online Backup service will retain up to five versions of your successfully backed up files for as long as your account remains active.
To remove files and folders from your backup set clear the corresponding check boxes.
For additional details, please refer to this article Tell me about backing up the My Documents folder with Quicken Online Backup.
For more information about Online Backup, please refer to Quicken Online Backup.