These files are no longer there since 2018.
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2018 releases were the last MIP SDK releases to include the following components: ImageViewer, AudioPlayer, EngineManager ActiveXs and the “UseActiveX” environment option.
With MIP SDK 2019 R1 these components will be officially discontinued and will no longer be included in the MIP SDK
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If you are getting an error when using the newest MIP SDK and the sample you mention I must suspect some form of setup error that I have not experienced yet when doing support, so if this is the case please elaborate on what you are doing and what you are experiencing