Disable the menu File->Options on the machine


Supported on: At least Windows Vista
Registry HiveHKEY_LOCAL_MACHINE or HKEY_CURRENT_USER
Registry PathSOFTWARE\Policies\Devolutions\RemoteDesktopManager
Value NameDisableFileOptions
Value TypeREG_DWORD
Enabled Value1
Disabled Value0

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Administrative Templates (Computers)

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