Please login to Avrodh.com. Locate the "My Purchases" menu item from top menu, Click it.
Click on "Details" button for license/trial 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.