Deregistration is just the opposite of Registration. In other words, deregistration means the removal of item Open in Image Viewer… from the Windows Explorer’s context menu. However, this procedure is only required if program Image Viewer should be removed from a computer and it has been registered beforehand.
In order to perform this deregistration the program Image Viewer has to be started with administration rights. To do this, simply open the Windows Explorer, locate and select file ImageViewer.exe, right–click it and choose item Run as Administrator from the context menu. After confirming the User Account Control the program Image Viewer starts with administration rights.
As next open the program’s Settings dialog. Do this either by using the toolbar or simply by using shortcut CTRL+S. In the opened dialog box choose then item General, which can be found at the dialog’s left side, to preselect the needed settings page. Thereafter, find and click button [Deregister], which is now available at the dialog’s right pane. Please keep in mind; if the program is started without administration rights then a warning will appear.
Finally, just close the Settings dialog. It does not matter if button [OK] or [Cancel] is used. Additionally, the whole program should be closed because administration rights are no longer needed.
If a new instance of the Windows Explorer is started after this deregistration procedure, its context menu does not longer include the menu item Open in Image Viewer…, which has been inserted during registration.
As mentioned above program Image Viewer has to be deregistered manually before it can be finally removed. Furthermore, please be aware under some circumstances it might not be possible to delete the binary files representing the Image Viewer’s Explorer Extension at once. The reason behind, these binary files are in use by the Windows Explorer at the moment. Is this the case then simply close all running instances of the Windows Explorer. Thereafter, start a new Windows Explorer and navigate to the directory where program Image Viewer is located, but without opening any context menu. As next select all files contained in the program’s folder and delete them. The easiest way to do this without context menu is: press shortcut CTRL+A to select all files and then press keyboard key DEL to remove them. That’s it, done!
Finally and again please keep in mind, if all files of program Image Viewer have been removed before executing the deregistration procedure a registration cannot be undone! And as result of this, the Windows Explorer may crash each time its context menu is opened.
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