ClickOnce applications are typically installed in the following folders:

Windows 8, Windows 7, Windows Vista

%USERPROFILE%\appdata\Local\Apps\2.0

Windows XP

%userprofile%\Local Settings\Apps\2.0

Clean-up all ClickOnce folders

Do this only if the ClickOnce package doesn't work properly or gives errors.

From an Administrator Command Prompt window, execute the command:

rundll32 dfshim CleanOnlineAppCache