Deleting Quicken Data Files
Before proceeding, consider backing up the Quicken data file instead of deleting it. The file can serve as an archive of your financial data. If you no longer use the data file and have started a new one, you copy the file to another place on your hard drive, or back it up on a CD/DVD or another type of removable media.
The data file cannot be deleted from within Quicken. To delete the data file, you will need to browse to the location of the data file to delete it. The default location of Quicken data files are located: C:\documents and settings\[user name]\my documents\Quicken. Alternatively, you may search your hard drive for .QDF (your Quicken data file's extension).