Be aware that you'll lose any changes you made since the backup was created. What does it mean to overwrite a file?: Restoring a backup file replaces your current data with the data stored on the backup. If you are restoring a file over the current file, click OK to overwrite the current file then click Yes to open the restored file.After naming the file and selecting the location, click Save, then click Yes to open the restored file. If you Create a copy, you will need to select a location to save the copy to and you will also need to give the copy a unique file name.
The Quicken backup file has the extension.