This tool is intended to save animation data to a *.dkanim file to then be able to import said animation to same rig in another or same Autodesk® Maya® scene file.

You can find more detailed information on the tool's features on my website here: https://erwintools.wordpress.com/freetools/dkanimerwin/

The installer that ran when you downloaded this plug-in from Autodesk App Store has already installed the plug-in, displayed under custom shelf of Maya. You may need to restart the Autodesk product to activate the plug-in.
 
To uninstall this plug-in, click Control Panel > Programs > Programs and Features (Windows 7/8/8.1/10) or Add/Remove Programs (Windows XP), just as you would uninstall any other application from your system.

I am only able to test the script in Maya on Windows: 7 and 10.
But the script should work on any and all versions of Maya for all operating systems.  I have been using the script for about 10 years now, including early versions of Maya.