Please login to Avrodh.com. Locate the "My Purchases" menu item from top menu, Click it.
Click on "Show Details" button for license whose key you want to access.
You will now see purchase detail page. Click on "Show" to view your license/trial key.
Click on "Copy" to copy that license/trial key to your computer's clipboard. After this step you can paste it anywhere by pressing 'Ctrl + V' on your keyboard.