-Q&A Q.When I tried to install FLIPGEN， a message appeared [c:\ProgramFiles\FLIPGEN folder does not exist.] When I tried uninstallation of FLIPGEN through control panel， a message [Unexpected error occurred] appeared. When I try installation exe file again， a message [FLIPGEN has been already installed. Uninstall it.] appears.

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When I tried to install FLIPGEN, a message appeared [c:\ProgramFiles\FLIPGEN folder does not exist.] When I tried uninstallation of FLIPGEN through control panel, a message [Unexpected error occurred] appeared. When I try installation exe file again, a message [FLIPGEN has been already installed. Uninstall it.] appears.

When FLIPGEN folder is manually deleted instead of using uninstallation function of Windows, this type of phenomenon occurs.

Installation information of FLIPGEN may be remaining in registry.

When uninstall FLIPGEN, please use uninstallation function of Windows.