Wallet Recovery Using Encrypted Private Key String

Found privates keys from 2017 email
I have used search, and cannot find the solution to recover wallet via encrypted private key…only with 12 word seed?
Please advise

The attached encrypted file contains Litecoin private keys and should be kept safe at all times. Don’t forget the encryption password!

If the password you have used to encrypt the wallet is strong, forget about it. The Litecoin is lost. To “recover” the password of an encrypted wallet would enable thieves to steal Litecoin more easily.

Try a different wallet, there are quiete a few accepting private keys I guess.