I press the Install button. Native Access starts downloading India.
Two downloaded files appear in the Download Location folder.
After installation is complete, Native Access displays a success message.
There are no files from the India plug-in in any of the folders set in preferences,
including those that were just displayed in the Download Folder.
Native Access returns to the starting point
and the India plug-in will be displayed in the library as installable.
I haven't tried installing all the plugins yet,
but all the others I've installed have installed fine.