Hi Sanjiv,
Once the plugin has been installed and activated, it will replace the traditional post excerpt meta box (on the post edit screen) with a TinyMCE editor.
If the excerpt box is not appearing, you’ll want to verify that:
a) the post type you’re working on supports post excerpts (custom post types would need “excerpt” in its “supports” argument)
b) the excerpt meta box is visible. In the top right corner of the post edit screen, there should be a “screen options” tab — clicking that will expand a panel with a list of available meta boxes; please ensure “Excerpt” is checked.
If the post meta box is still missing, please let me know!
