# Uninstall

To uninstall dviout, do the followings to restore the state before dviout was Installed.
1. Use "Option -> Uninstall" (to erase the entire contents of the Registry written by dviout and to remove dviout from the start menu). Then quit current dviout session.
2. Delete files, such as dviout.exe, dviout.hlp, and dviout.cnt and any related files, dviout.par, dviout.vfn, and documents (by using the Windows Explorer).
Note 1. dviout does not install or modify any files in the Windows directory. Only the Windows Registry is related to the Windows systems. For ease of uninstalling, it would be better to put dviout files to a separate directory besides any other applications.
Note 2. Usually, Upgrading dviout requires only to replace files, dviout.exe, dviout(e).hlp, and dviout(e).cnt. Exceptions, if any, will be described in the documentation. You don't have to press "Option -> Uninstall" when upgrading. If you do this, the various Parameters previously set are all cleared.
Note 3. Be aware that after using "Option -> Uninstall" to delete Registry entries for dviout, if dviout is started, Registry is written to again.
Note 4. When setting or updating with "Option -> Install", the previous settings are overwritten and deleted. Therefore, an Uninstall is not needed before this action.