How to change old LTC address (Paperwallet) to new compatible shorter address

I have an old paperwallet (2017) with long address and isn’t compatible with the newer short addresses needed to sell my holdings. How can I change this old paper wallet into a new compatible address?

Have you tried going into the wallet details tab on ? (Do it in offline mode of course)

I too cannot get the recently downloaded Litecoin Core wallet to import my encrypted paper wallets. I would be very grateful for any help. Can anyone steer me to where I can find clear instructions?