When I right click on Main Menu and select Edit Menus nothing happens. I want to edit few of the menu items and I am stuck. How do I edit main menu now?
Right Clicking the Menu and choosing the "Edit Menus" option runs the application called "alacarte"
You can run the application from the terminal window
The advantage of running the application this way, is that any errors during the startup of the application will be reported to you and possibly this could guide you on how to diagnose the issue.
Open a terminal and type this:
If an error output, add to your message please.