Since database files can be copied or deleted only if the library is uninstalled, you may need to uninstall a library. In addition, a high number of libraries can slow the overall performance of Mass Frontier so the uninstallation of unused libraries can be of benefit. If you uninstall a library, the library is not deleted. The library reference is merely removed from the program without the loss of spectral or structural information. An uninstalled library can be reinstalled at any time. Mass Frontier allows you to install or uninstall a library as many times as you wish.

To uninstall a library:

1. Choose the Library | Uninstall Library menu item to display the Uninstall Library window.
   
   
2. Select the library you want to uninstall.
   
   
3. Press the Uninstall button.

Note: Database files (*.mdf) cannot be copied or deleted when the library is installed. If you need to make backup copy or you want to permanently delete a library from your hard drive, you must uninstall it first.