Dragon Professional Individual keeps a backup copy of each user's speech files. It automatically makes this copy every fifth time you save Dragon Professional Individual's speech files — which most people do when they are prompted to as they exit Dragon Professional Individual.
You can make this backup more or less frequent by using the Options dialog box. Or, go to Tools→ Options→Data and change the setting to Automatically Back Up User Profile Every xx> Saves.
The backup speech files lag behind any changes you make by correcting or training Dragon Professional Individual. So, if you make a mistake and save speech files when you shouldn't have (perhaps you vocabulary-trained using the wrong documents), you can restore from an earlier version of those files.
You can tell Dragon Professional Individual to update the backup copy at any time by choosing Manage User Profiles→Advanced→Backup. To restore from the backup copy, choose Profiles→Advanced→ Restore. (The files are located in the folder where you installed Dragon Professional Individual, in the Users folder there, in the folder that goes with your particular username.)
