Projection (.prj) file location

Please remove any previous versions of these projection files from your favorites location before installing these new versions.

ArcGIS
Copy "Coordinate Systems" folder to C:\Users\%username%\AppData\Roaming\ESRI\Desktop10.5\ArcMap
Copy .prj files from "ArcMap_builtin" folder to C:\Users\%username%\AppData\Roaming\ESRI\Desktop10.5\ArcMap\Coordinate Systems

ArcGIS Pro
Copy .prj files from "Coordinate Systems" folder to C:\Users\%username%\AppData\Local\ESRI\ArcGISPro\Favorites
Copy .prj files from "ArcPro_builtin" folder to C:\Users\%username%\AppData\Local\ESRI\ArcGISPro\Favorites

Note: The "ArcMap_builtin" and "ArcPro_builtin" folders are used because ArcMap and ArcGIS Pro have slight
differences in the naming of the built in projection (.prj) files.  The ArcGIS Pro names will take priority
as ArcGIS Desktop/ArcMap reach the end of ESRI support.  These projections are not available in earlier
ArcGIS versions and are included for compatibility with the newer versions.
