VNC (Virtual Network Computing) software is a remote desktop solution which makes it possible to view and fully-interact with one computer from any other computer or mobile device anywhere on the Internet. VNC software is cross-platform, allowing remote control between different types of computer.
The server component stores the encrypted login password in the registry under the key:
This feature decodes encrypted VNC passwords into their clear text form.
Simply cut and paste the encrypted password from the registry into the dialog; the decoder will do the rest.