Elgato Game Capture 4K60 Pro MK.2 is a new product.
There is no free or paid upgrade path from the original Elgato Game Capture 4K60 Pro to Elgato Game Capture 4K60 Pro MK.2.
Furthermore, the warranty coverage for Elgato Game Capture 4K60 Pro does not cover an exchange that will send you Elgato Game Capture 4K60 Pro MK.2.