Yes I think I know what you must be referring to. Below are the instructions on how to manually install Tacview. So perhaps it works exactly the same for MCS:
If the automatic installation has failed, you can manually install the exporter yourself by copying the content of C:\Program Files (x86)\Tacview\DCS\ (Mods and Scripts folder) in your %USERPROFILE%\Saved Games\DCS\ folder.
If you have multiple versions of DCS World installed on your system, you may want to copy the exporter in all of your %USERPROFILE%\Saved Games\DCS.*\ folders. If you are using third party scripts with DCS World, *DO NOT* copy C:\Program Files (x86)\Tacview\DCS\Scripts\Export.lua in your DCS World script folder. Just add the following line in your current %USERPROFILE%\Saved Games\DCS\Scripts\Export.lua script:
local Tacviewlfs=require('lfs');dofile(Tacviewlfs.writedir()..'Scripts/TacviewGameExport.lua')