AppUpdate Component error

I am getting an error when trying to use the AppUpdate Component.

[dcc64 Fatal Error] Unit1.pas(14): F2613 Unit 'VCL.TMSFNCAppUpdate' not found.

but it is in my "uses" list.

Is the unit where the source code file VCL.TMSFNCAppUpdate.pas is located added to your Win64 library path?

That fixed it.. thanks..

Not sure why I have to that for this component and not the others?

I can only suspect that the installer didn't detect the 64bit compiler on your system.